1Prepared by:Sami0333-6006036CHAPTER # 1Periodic Classification of Elements & Periodicity1. Which of the following pairs are chemicallydissimilar?(A) Na and K (B) Ba and Sr(C) Zr and Hf (D) Ca and Zn.2. The total number of inner transition elementsis(A) 10 (B) 14(C) 28 (C) 303. The alkali metal which is liquid at 15oC is(A) K (B) Cs(C) Na (D) None4. Which of the following ion will form most watersoluble hydroxide?(A) K+(B) Ni2+(B) Zn2+(C) Al3+5. Which of the following has greatest tendencyto lose electron?(A) F (B) Fr(B) S (C) Be.6. The oxide of which of the following elementswill be acidic in character(A) Mg (B) Rb(C) Li (C) CI7. Which of the following is isoelectronic withcarbon atom?(A) Na+(B) Al3+(C) O2-(D) N+8. Which of the following ions are paramagneticin character?(A) Zn2+(B) Cu+(C) Ni2+(D) Ag+9. Ca2+ion is isoelectronic with(A) Mg2+(B) Na+(C) Ar (D) Kr10. Gradual addition of electronic shells in thenoble gases causes a decrease in their(A) Ionization energy (B) atomic radius(C) Boiling point (D) density.11. Which of the following has highest firstionization potential?(A) Carbon (B) Oxygen(C) Nitrogen (C) Boron.12. Which of the following has the smallest size?(A) Na+(B) Mg2+(C) Al3+(D) CI13. Which of the following element has themaximum electron affinity?(A) F (B) S(C) I (D) CI.14. Which of the following is isoelectronic as wellas has the same structure as that of N2O ?(A) N3H (B) H2O(B) NO2 (C) CO215. The atomic radius increases as we movedown a group because(A) Effective nuclear charge increases(B) Atomic mass increases(C) Additive electrons are accommodated innew electron level(D) Atomic number increase.16. Which one of the following is an incorrectstatement?(A) The ionization potential of nitrogen isgreater than that of chlorine(B) The electron affinity of fluorine is greaterthan that of chlorine(C) The ionization potential of beryllium isgreater than that of boron(D) The electronegativity of fluorine is greaterthan that of chlorine.17. Electron affinity depends on(A) Atomic size(B) Nuclear charge(C) Atomic number(D) Atomic size and nuclear charge both.18. Two elements whose eletronegativities are 1.2and 3.0, the bond formed between them wouldbe(A) Ionic (B) covalent(C) Coordinate (C) metallic.
219. Ionic radii are(A) Directly proportional to square of effectivenuclear charges(B) Inversely proportional to effective nuclearcharge(C) Inversely proportional to square ofeffective nuclear charge(D) Directly proportional to effective nuclearcharge.20. Which of the following oxides is atmospheric incharacter?(A) CaO (B) CO2(C) SiO2 (D) SnO221. Mark the correct statement:(A) Na+is smaller than Na atom(B) Na+is larger than Na atom(C) CI-is smaller than CI atom(D) CI-and CI are equal in size22. Who introduced the zero groups?(A) Lothar Meyer (B) Lockery(C) Mendleev (D) Ramsay23. Element, of group I-B are called(A) Representative elements(B) Transition elements(C) Rare earth(D) Coinage metals24. The element with Z = 24 is placed in the period(A) 5 (B) 2(C) 3 (D) 425. Which is the part of metalloids?(A) NA and K (B) F and CI(C) None of these (D) Cu and Au26. Which one of the following has the maximumelectron affinity?(A) I (B) Br(C) CI (D) F27. On electrolysis of NaH, hydrogen is liberated(A) At anode (B) in the electrolyte(C) At cathode (D) none of them28. Elements with greater number of electronshave _________values of ionization energy.a) Only one b) More than onec) Zero d) Infinite29. Which of the following possess maximumhydration power?a) Na+b) K+c) Mg+2d) Ca+230. Higher value of electron affinitymeans_________a. Atom will lose electron easilyb. Atom will gain electron easilyc. Atom may form di-positive iond. The reason is unknown31. Melting points of VII-A group ___________down the groupa. Increase b Decreasec. Remain constant d. No regular trend32. Oxidation state of an atom represents______a. No. of electrons gainedb. No. of electrons lostc. No. of electrons gained or lostd. None of above correctly represent it33. Mendeleev’s periodic table was based ona) Atomic number b) Atomic massc) Atomic volume d) Electronic configuration34. Elements present in a same group have thesamea) Atomic numberb) Molecular weightc) Chemical propertiesd) Electronic configuration35. “s” and “p” block elements are also calleda) Transition elementsb) Inert elementsc) Typical elementsd) Rare earth elements36. What is the symbol of the element with onlythree electrons and three protons?a) Li b) Cc) Ag d) Cu37. Elements with seven electrons in their valenceshell are known as
3a) Inert b) Lanthanidesc) Halogens d) Alkali metals38. Which of the following pairs of elements arechemically most similar?a) Na and Al b) Cu and Cuc) S and F d) Sc and Zn39. A student of chemistry will identify positivelythe following symbols as sodiuma) W2311b) X4019c) Y2613d) Z321640. In the periodic table each period begins with ametal, which isa) Most electronegativeb) Most electropositivec) Less electropositived) Less electronegative41. Which one of the following is not a coinagemetal?a) Au b) Cuc) Ag d) Pd42. Which is the most metallic element of 2ndperiod?a) Lithium b) Berylliumc) Boron d) Carbon43. The outer most orbital involved in chemicalbonding is calleda) Molecular orbital b) Complete orbitalc) Valence orbital d) Free orbital44. Elements, which form basic oxides area) Electropositive b) Electronegativec) Inert d) None of these45. Which of the following has the most basiccharacter?a) Na2O b) MgOc) Al2O3 d) P2O346. Which of the following is smallest in size?a) K+1b) O-2c) F-1d) Na+47. Ionization energy is lowest fora) Inert gases b) Halogensc) Alkali metals d) Alkaline earth metals48. An isotope of hydrogen isa) Neptunium b) Plutoniumc) Thorium d) Tritium49. With respect to chlorine, hydrogen will bea) Electropositive b) Electronegativec) Neutral d) None of these50. Which of the following has the highest electronaffinity?a) 1S22S22P3b) 1S22S22P63S1c) 1S22S22P5d) 1S22S22P551. Excluding hydrogen and helium, the smallestelements in the periodic table isa) Lithium b) Fluorinec) Cesium d) Iodine52. Which halogen has the smallest electronaffinity?a) F b) Clc) Br d) I53. The element with atomic number 7 is likely tohave same properties to the element whoseatomic number isa) 11 b) 2c) 15 d) F54. Which of the following will have largest size?a) Br b) I -1c) I d) F55. In its chemical properties, calcium is mostsimilar toa) Cs b) Cuc) Sc d) Sr56. Which two of the following are iso electronicwith one another?a) Na+ and O b) Na+ and K+c) Na+ and Ne d) Ne and O57. Which of the following is a transuranicelement?
4a) Americium b) Plutoniumc) Neptunium d) All of these58. The hydrogen, which is present in theatmosphere of sun and stars in a largeamount, isa) H2 b) Hc) H+d) H-59. Cesium and Francium are liquids abovea) 10oC b) 15oCc) 20oC d) 30oC60. In an aqueous solution the hydrides of alkalimetals area) Stable b) Unstablec) No change d) None of these61. As the atomic number of the halogenincreases, the halogensa) Lose their outermost electrons less easilyb) Become less densec) Becomes lighter in colord) Gain electrons less easily62. The electron affinity of fluorine isa) – 348.8 kj/mol b) – 337 kj/molc) 337 kj/mol d) 348.8 kj/mol63. Which ionic halides have high m.p and b.p?a) Fluoride b) Chloridec) Bromide d) Iodide64. Which gas is used in the making of tungstenbulb filaments?a) H2 b) N2c) O2 d) CO265. The ionic halides in order of decreasing m.pand b.p can be arranges asa) Iodide>bromide>chloride> fluorideb) Bromide>chloride>fluoride>iodidec) Chloride>bromide>iodide>fluorided) Fluoride>chloride>bromide>iodide66. A hydride ion and helium atom has samenumber ofa) Protons b) Neutronsc) Electrons d) All of these67. Ionic hydrides are also calleda) Saline hydrides b) Salt like hydridesc) Both a & b d) None of these68. The hydrides are acts as powerful reducingagents area) Ionic b) Covalentc) Interstitial d) Complex69. The hydrides which are non stoichiometric innature area) Ionic b) Covalentc) Interstitial d) Complex70. Which one is the example of complex hydride?a) PH3 b) NaHc) LaH3 d) NaBH471. The adsorption of hydrogen by platinum isknown asa) Hydrogenation b) Dehydrogenationc) Occlusion d) Substitution72. From left to right in a periodic table charge tomass ratio increases therefore the hydrationenergya) Decreases b) Increasesc) Remains constant d) None of these73. ______ elements have been discovered sofar.a) 100 b) 110c) 120 d) 15074. _______ classified the then known elementsinto metals, non metals and their derivatives.a) Dobreiner b) Al – Razic) Newlands d) Mendeleeve75. Dobreiner’s work led to the law of triads whichstates that ______a) Atomic weight of any one element wasfound to be approximately the mean of theother two elements of triad.b) Atomic weight of the middle element wasfound to be approximately the mean of theother two elements of a triad.c) Atomic number of any one element wasfound to be approximately the mean of theother two elements of a triad.d) Atomic number of the middle element wasfound t be approximately the mean of theother two elements of a triad.76. The law of octaves was given by _______
5a) Dobreiner b) Al – Razic) Newlands d) None of these77. Law of octave states that ______a) The properties of every 6thelement from thegiven one were similar to the first.b) The properties of every 9thelement from thegiven one were similar to the first.c) The properties of every 8thelement from thegiven one were similar to the first.d) The properties of every 7thelement from thegiven one were similar to the second.78. Mendeleev’s Periodic Table was based on_______a) Atomic number b) Atomic massc) Atomic volume d) Electronic configuration79. Moseley’s work led to the periodic law, whichstates that _______a) The number of the electrons in the 1stenergy level increases as the atomicnumber increases.b) The properties of the elements are aperiodic function of their atomic mass.c) The x – rays spectra of the elements aremore complex than the optical spectra.d) The properties of elements are the periodicfunction of their atomic number.80. A pair of elements in the same family in theperiodic table classification is ________a) Chlorine and carbonb) Calcium and aluminumc) Nitrogen and neond) Sodium and potassium81. In the period, the elements are arranged instrict sequence in order of _______a) Increasing charges in the nucleus.b) Increasing atomic weights.c) Increasing number of electrons in valenceshell.d) Increasing valency.82. Uranium is a member ofa) s – block b) p – blockc) d – block d) f – block83. How many ionization energies can carbonhave?a) 1 b) 2c) 4 d) 684. Which ion has the maximum polarizationpower?a) L+b) Mg 2+c) Al3+d) O2-85. Which of the following halides is not oxidizedby MnO2?a) F b) Cl-c) Br d) I86. The process requiring absorption of energy isa) F → F b) Cl → Clc) O → O2d) H → H87. Most of the known elements are metals of______ of periodic table.a) D – block b) P – blockc) III – group d) Zero block88. The volume in cubic centimeters occupied byone gram atom of the element is called______a) Atomic volume b) Atomic weightc) Mass number d) None89. The lowest ionization energies are found in the_______a) Inert gases b) Alkali metalsc) Transition elements d) Halogens90. The unit of ionization energy is _______a) Joule b) Caloriec) Electron volt d) None91. The electropositive elements form _____a) Acidic oxides b) Basic oxidesc) Neutral oxides d) Amphoteric oxide92. The electronegative elements form _____a) Acidic oxides b) Basic oxidesc) Neutral oxides d) Amphoteric oxide93. The ionization energy of nitrogen is more thanoxygen because of _______a) More attraction of electrons by the nucleusb) More penetration effectc) The extra stability of half filled p – orbitald) The size of nitrogen atom is smaller.
694. _______ ion has the largest radius.a) Al+3b) Cl-1c) F-1d) O-295. Ionic hydrides are usually _______a) Liquids at room temperatureb) Good reducing agentsc) Good electrical conductors in solid stated) Easily reduced.96. The hydronium ion is a/an _______a) Ion with formula H2O+b) Ion with the formula H3O+c) Free radical rather than an iond) Ion formed by removal of H-form a watermolecule.97. When steam is passed over red hot coke at1000oC, a mixture of carbon monoxide andhydrogen gas is produced. It is known as______a) Heavy water b) Water gasc) Phosgen gas d) NoneCHAPTER # 2S-Block Elements1. The oxides of beryllium are.(A) Acidic (B) Basic(C) Ba+2(D) Mg+22. Which ion will have the maximum value ofheat of hydration?(A) Na+(B) Cs+(C) Ba+2(D) Mg+23. Which one of the following is not an alkalimetal?(A) Sodium sulphate B) Potassium sulphate(C) Zinc sulphate D) Barium sulphate4. The element cesium bears resemblance with.(A) Ca (B) Cr(C) Both of the above (D) None of the above5. Chile saltpeter had the chemical formula(A) NaNO3 (B) KNO3(C) Na2B4O7 (D) Na2CO3H2O6. The ore CaSO42H2O has the general name.(A) Gypsum (B) Dolomite(C) Calcite (D) Epsom salt7. Downs cell is used to prepare.(A) Sodium carbonate(B) Sodium bicarbonate(C) Sodium metal(D) Sodium hydroxide8. Which element is deposited at the cathodeduring the electrolysis of brine in Nelsons cell?(A) H2 (B) Na(C) CI2 (D) O2
79. Ionic radius of potassium is.(A) 60 pm (B) 133 pm(C) 99 pm (D) 169 pmB10. Among alkaline Earth Metals, the highest heatof hydration is of.(A) Be (B) Sr(C) Rb (D) Cs11. The chemical formula of sylvite is.(A) Na2CO3. H2O (B) KCI(C) KCI. MgCL2. 6H2O (D) NaCI12. The chemical formula of Alumite (Alum stone)is.(A) KCI. MgCI2. 6H2O(B) KCI(C) Na2B4O7. 10H2O(D) K2SO4 Al(SO4)3. 2Al(OH)313. Among alkali metals the lowest atomic numberis of.(A) Rb (B) K(C) Sr (D) Li14. Due to the high reactivity nature of the alkalimetals, they are found in.(A) Free in nature(B) Bounded with other elements(C) Not free in nature(D) All of the above15. Magnesium is an essential constituent of.(A) Storaata (B) Plants(C) ChlorophyII (C) None of the above16. Which of the alkali earth metal has radioactivenature.(A) Be (B) Rb(C) Both of the above (D) Na17. Calcium Phosphate Ca3 (PO4) and calciumfluoride CaF2 are essential part of livingorganisms.(A) Bones, egg shells (B) teeth(C) Sea-shells (D) All of the above18. Dolomite is a compound of which elements.(A) Be (B) Mg(C) Ca (D) Ba19. The melting point and boiling point of whichalkaline earth metal is high.(A) Sr (B) Mg(C) Be (D) Na20. The super oxides are formed by the elements.(A) K, Rb, Cs (B) K, Na, Cs,(C) K, Li, Na (D) None of the above21. Potassium, rubidium and caeslium are sohighly reactive that they react with ice even at .(A) -100OC (B) -200OC(C) -50oC (D) -0oC22. Among the alkaline earth metal which hasleast reactivity even upto 800oC(A) Ba (B) Cs(C) Li (D) Be23. Plaster of paris is formed after heating upto100OC(A) Mg(NO3)2 (B) CaSO4, 2H2O(gypsum)(C) NaNO2 (D) LiNO324. The root system of several plants have beengreatly enlarged by the application of.A) Sulphur B) GypsumC) Both of the above D) None of the above25. When deficiency of calcium exists varioussubstances are accumulated in plants inharmful concentration which are.(A) Lime(B) Aluminium(C) Aliminium and Manganese(D) None of the above26. Which alkali metal behave different by fromothers?(A) Mg (B) Na(C) Rb (D) Li27. Spodumene, petalite, halite, natron, alinite arethe common minerals of.A) Alkali metals B) Alkaline earth metalsC) Both of the above D) Li28. Sodium is prepared by the electrolysis of.(A) Simple NaCI in Down,s cell(B) Molten NaCI in Down,s cell(C) Molten sodium hydroxide in downs cell(D) None of the above29. Lime is used in.
8(A) Glass industry(B) Glass and paper industries(C) Paper industries(D) None of the above30. The elements which are very abundant inearth crust are__________a) Si & Aℓ b) Ca & Mgc) B & Aℓ d) All31. The oxides of Be are ___________a) Acidic b) Basicc) Amphoteric d) None32. Carbonates of lithium are not stable like that ofsodium due to _____a) Low electronegativityb) Low electropositivityc) Low charge densityd) Not know yet33. Which one of the following is not an alkalimetal?a) Francium b) Caesiumc) Rubidium d) Radium34. Which of the following sulphates is not solublein water?a) Sodium sulphate b) Potassium sulphatec) Zinc sulphate d) Barium sulphate35. The ore CaSO4.2H2O has the generalname____a) Gypsum b) Dolomitec) Sodium metal d) Sodium hydroxide36. Crystals of Na2CO3. 10H2O when exposed toair, _______a) Lose water and remain solidb) Gain water and remain solidc) Gain water and become liquidd) Remains unchanged.37. The deliquescence is a process in which asolid________a) Absorbs moisture and remains solidb) Absorbs moisture and turns to liquid formc) Loses water of crystallizationd) Increases the number of water ofcrystallization38. In diaphragm cell, level of brine in anodecompartment is kept slightly higher whichprevents_________a) Hydroxide ions to reach anodeb) Chlorine gas to mixc) Anode to decayd) All39. Alkali metals form bondsa) Ionic b) Covalentc) Metallic d) Co-ordinate covalent40. The alkali metals, which have radioactiveisotopesa) Li b) Nac) K d) K and Rb41. Halite is the mineral ofa) Sodium b) Potassiumc) Lithium d) Cesium42. Na2SO3.10H2O is the mineral of sodium and iscalleda) Spodumene b) Halitec) Natron d) Sylvite43. Which one of the following is dolomite?a) MgCO3 b) MgCO3.CaCO3c) CaCO3 d) BaSO444. The high electrical conductivity of alkali metalsis due to thea) Free motion of valence electronsb) High I.Pc) Lesser atomic radiid) None of these45. Sodium imparts color to Bunsen flamea) Green b) Violetc) Blue d) Yellow46. All alkaline earth metals are white excepta) Mg b) Cac) Be d) Sr47. Metals, which are higher that water, area) Alkaline earth metalsb) Coinage metalsc) Alkali metalsd) All of these48. Except lithium, the hydroxides of all alkalimetals area) Strongly acidic b) Strongly basicc) Weakly basic d) All of these
949. The carbonates and phosphates of whichelements are insoluble in watera) Na and K b) Na and Bec) Li and Mg d) All of these50. All alkaline earth metals react with water atroom temperature to release hydrogen andgive basic solutions excepta) Be and Ca b) Be and Mgc) Ca and Mg d) Mg and Sr51. Lithium only forms normal oxides when burnton air but when sodium burnt in air it formsa) Normal oxides b) Sub oxidesc) Peroxides d) Super oxides52. The super oxides of alkali metals are generallyrepresented bya) M2O b) M2O2c) MO2 d) M2O353. The nitrates of which group decompose onheating with the formation of nitrites andevolution of oxygena) IA b) II Ac) III A d) IV A54. A small amount of calcium chloride or mixtureof KCl and KF is added to NaCl in Down’s cella) To make it good conductorb) To decrease the m.p of NaClc) To increase the ionization of NaCld) To decrease the ionization of NaCl55. Liquid sodium in the Down’s cell is collected ata temperature ofa) 700oC b) 600oCc) 500oC d) 400oC56. The product, which is obtained at cathode inthe Down’s cell isa) Liquid Sodium b) Dry chlorinec) Water d) Hydrogen57. Which is manufactured by the electrolysis offused sodium chloride?a) NaOH b) NaHCO3c) Na d) Na2CO358. Which of the following does not conductelectricity?a) Boron b) Galliumc) Indium d) Thallium59. Which alkali metal is rare and found in a smallamount in all – igneous rocks?a) Li b) Nac) K d) Fr60. The ingredient of baking powder isa) NaHCO3 b) NaOHc) Na2CO3 d) NaCl61. The formula of plaster of Paris isa) CaSO4 b) CaSO4.H2Oc) CaSO4.2H2O d) 2CaSO4.H2O62. Which of the following is fluorspar?a) CaO b) CaCO3c) CaF2 d) NaOH63. Potassium is kept ina) Water b) Alcoholc) Ammonia d) Kerosene oil64. Which one has high m.p?a) NaCl b) NaBrc) Nal d) NaF65. Which one of the following is most basic?a) Al2O3 b) SiO2c) P2O5 d) MgO66. Gypsum isa) CaSO4.2H2O b) CaSO4.H2Oc) CaSO4 d) MgSO467. Which one is commonly used as alaboratory desicator?a) Na2CO3 b) NaClc) CaCl3 d) NaOH68. The radioactive alkaline earth metal isa) Be b) Mgc) Ra d) Ba69. Which one of the following elements has itscompounds which are diamagnetic andcolourless?
10a) Be b) Src) Na d) All of these70. Which metal is an important component oftransistors?a) Ag b) Auc) Ra d) Os71. Which impurities are present in common salt?a) Na2SO4 b) CaSO4c) CaCl2 d) All of these72. K can displace Na from NaCl due toa) Greater I.P of Kb) Greater I.P of Nac) More electropositivity of Kd) More electropositivity of Na73. The alkali metal, which is artificially prepareda) Na b) Rbc) Fr d) Cs74. The chemical use for the production of CO2 inthe fire extinguishers isa) NaOHb) NaClc) NaHCO3 and dilute acidd) NaHCO3 and NaOH75. LiCl is more soluble in organic solvents thanNaCl becausea) Li+1has higher heat of hydration than Na+b) Li+1has lower heat of hydration than Na+c) LiCl is more covalent than NaCld) Lattice energy of NaCl is less than that ofLiCl76. Which compound is used for uric acidtreatment in human beings?a) Na2CO3 b) NaHCO3c) Li2CO3 d) NaNO377. Which element is used in T.V picture tube?a) Na b) Kc) Ca d) Cs78. Which one is used in the manufacture of chalkpencils?a) Marble b) Gypsumc) Epsom salt d) Baking soda79. Plaster of Paris has a structurea) Cubic b) Monoclinicc) Hexagonal d) Orthorhombic80. Potassium super oxide (KO2) is used inbreathing equipments for mountaineers andspace craft because it absorba) Oxygen and giving out CO2 at the sametimeb) N2 and giving out CO2 at the same timec) CO2 and giving out O2 at the same timed) Pollutants and giving out O2 at the sametime81. The hydroxide, which is called milk ofmagnesium and is used for treatment of acidityin stomach, isa) Ca(OH)2 b) Mg(OH)2c) Sr(OH)2 d) Ba(OH)282. Mg+2is smaller the Na+1becausea) Mg+2has fewer electron than Na+1b) Mg+2has greater electron than Na+1c) Mg+2has greater atomic number than Na+1d) Mg+2has low I.P than Na+183. Which of them has almost sameelectronegativity?a) Be, B b) B, Alc) Be, Al d) K, Na84. A mixture formed by mixing one volume ofslaked lime Ca(OH)2 with three or four volumeof sand and water to form a thick paste iscalleda) Lime water b) Dead waterc) Quick lime d) Milk of lime85. If the compound has the same crystalstructure and analogous formulae, they arecalleda) Isotopes b) Allotropesc) Isomers d) Isobars86. Out of all elements of group IA, the highestheat of hydration is for _______a) K b) Rbc) Cs d) Li87. The nitride ion in lithium nitride is composed of
11a) 7 protons and 7 electronsb) 10 protons and 7 electronsc) 10 protons and 10 electronsd) 10 protons and 5 electrons88. When NH3 is passed over heated sodium at300oC, the product formed isa) NaNH2 b) NaNO2c) Na(NH3)2 d) Na3N89. Sodium metal can be stored undera) Benzene b) Kerosenec) Alcohol d) Water90. Chile sulphur isa) NaNO2 b) KNO2c) NaNO3 d) KNO391. Alkali metals do not exist ina) Monoatomic b) Diatomicc) Triatomic d) None of these92. In general alkali metals act as ________a) Reducing agentsb) Oxidizing agentsc) Both reducing and oxidizing agentsd) None of these93. Sodium is not observed in + 2 oxidation statebecause of its ______a) High first ionization potentialb) High second oxidation potentialc) High ionic radiusd) High electronegativity94. The metallic luster of sodium is explained bythe presence of _______a) Na+ ionsb) Conduction electronsc) Free protonsd) A body centered cubic lattice95. In the alkali metal series, Cesium is the mostreactive metal because _______a) Its incomplete shell is nearest to nucleusb) The valence electron has a larger orbit thanthe orbit of the valence electron of any ofthe other.c) It exerts considerable beautiful force on thevalence electronsd) It is a heavier metal.96. A graphite anode is used in Down’s cell for theproduction of sodium because ______a) It does not react with sodiumb) It does not react with chlorinec) It is easy to fashion in circular formd) It floats on the fused sodium chloride97. Alkaline earth metals form ______ carbides onheating with carbon.a) Stable b) Unstablec) Soluble d) None of these98. When burnt in air, Lithium forms _______a) Normal oxide b) Peroxidec) Super oxide d) None of these99. Sodium bicarbonate is commonly calleda) Soda ash b) Baking sodac) Caustic soda d) None of these100. _______ is a stronger base.a) NaOH b) KOHc) LiOH d) HCl101. Excess of NaOH reacts with zinc to forma) Zn(OH)2 b) ZnH2ZAc) Na2ZnO2 d) ZnO102. Which of the following represents calciumchlorite?a) CaClO2 b) Ca(ClO4)2c) Ca(ClO3)2 d) Ca(ClO2)2103. Sodium hydroxide solution reacts withphosphorus to give phosphine, To bring aboutwe need this reactiona) White phosphorus and dilute NaOHb) White phosphorus and concentrated NaOHc) Red phosphorus and dilute NaOHd) Red phosphorus and concentrated NaOH104. Sodium reacts with water more vigorously thanlithium because ita) Has higher atomic weightb) Is more electronegativec) Is more electropositived) Is a metal105. Plaster of Paris hardens bya) Giving off CO2b) Changing into CaCO3c) Uniting with waterd) Giving out water
13CHAPTER # 3Group III and IV Elements1. Which metal is used in the thermal processbecause of its activity.(A) Iron (B) Copper(C) Aluminum (D) Zinc2. Aluminum oxides is(A) Acidic oxide (B) Basic oxide(C) Amphoteric oxide (D) None of these3. Chemical composition of colemnite is.(A) Ca2B6O11. 5H2O (B) CaB4O7. 4H2O(C) Na2B4O7. 4H2O (D) CaNaB5O9. 8H2O4. Which element forms an ion with charge 3+.(A) Beryllium (B) Aluminum(C) Carbon (D) Silicon5. Which element among the following belongs toGroup IVA of the periodic Table.(A) Barium (B) Iodine(C) Lead (D) Oxygen6. Boric acid cannot be used.(A) As antiseptic in medicine(B) For washing eyes(C) In soda bottles(D) For enamels and glazes7. Which of the following elements is not presentabundantly in earths crust.(A) Silicon (B) Aluminum(C) Sodium (D) C8. The chief Ore of aluminum is.(A) Na3AIF6 (B) Al2O3. 2H2O(C) Al2O3 (D) Al2O3. H2O9. The Group IIA of the periodic table comprisesthe elements.(A) Boron, aluminum, gallium, indium andthallium.(B) Boron gallium, thallium.(C) Aluminum, calcium, strontium.(D) All of the above10. Boron is non-metallic because of(A) Large size and higher nuclear change(B) Small size and higher nuclear charge(C) Small size and smaller nuclear charge(D) None of the above11. The increase in the atomic size in group is(A) Regular (B) Irregular(C) Both (D) None of the above12. Orthoboric Acid is a mineral of.(A) Aluminum (B) Silicon(C) Calicium (D) Boron13. Aluminum is the third most abundant elementsin earth crust after.(A) Oxygen (B) Silicon(C) None of the above (D) Both of the Both14. Bauxite is an ore of.(A) Aluminum (B) Boron(C) Carbono (D) Gallium15. Which of the elements of Group IIA are rareand only obtained as by-products.(A) Gallium thallium(B) Thallium indium(C) Gallium indium(D) Gallium thallium indium16. Borax is the sodium salt of tetraboric acid. It ismost important of all among.(A) Borates (B) Carbonates(C) Bicarbonates (D) None of the above17. Borax occurs as natural deposit called tincal inthe dried up lakes of.(A) Tibet (B) California(C) Tibet & California (D) Virginia18. Group IV A of the periodic table compriseselements.(A) Carbon silicon(B) Tin, carbon , silicon(C) Carbon, silicon, tin and lead(D) None of the above19. The non-metals in Group IV A are.(A) Carbon, silicon (B) Tin and Lead(C) All of the above (D) None of the above20. The elements of Group IV A are charactersized by a set of .(A) Three valence shell electrons(B) Four valence shell electrons(C) Five valence shell electrons(D) Two valence shell electrons
1421. Group IV A elements form.(A) Super oxide (B) Oxides(C) Dioxide (D) All of the above22. The property of catenation among the carbonand silicon .(A) Increase on moving down the group formcarbon to lead(B) Decrease on moving down the group fromlead to carbon.(C) Decreases on moving down the groupfrom carbon to lead(D) Stable on moving down the group fromcarbon to lead.23. The oxides of carbon are(A) CO and CO2(B) CO, CO2 and C3O2 carbon sub oxide(C) CO, CO2, C2C3(D) None of the above24. China wares are made form a mixture of(A) Kaolin and bone ash(B) Kaolin and feldspar(C) Kaolin feldspar and bone ash(D) None of the above25. Various oxides are used as pigments in thepigments of which element.(A) Oxides of lead, basic lead carbonate etc.(B) Various oxides of lead(C) Various oxides of lead, basic leadcarbonate, lead chromate(D) Oxides of aluminum26. Boron occurs in traces and has been found tobe important for the growth of.(A) Plants of many kinds(B) Plants and animals(C) Animals(D) None of the above27. Semiconductors conduct electricity better than.(A) Conductors (B) Insulators(C) Both of the above (D) None of the above28. Oxygen is the abundant element in earthcrust?(A) Most of all(B) 2ndin number(C) Third most abundant(D) 4thmost abundant29. Substance which is found in dried up lakes ofTibet and California is______a) Tincal b) Boric Acidc) Calcium carbonate d) All30. Boron is a white crystalline solid and itis________a) More soluble in cold waterb) More soluble in hot waterc) More soluble in waterd) Soluble only in organic solvents31. One of the outstanding features of boron isability to form________a) Molecular addition compoundsb) Molecular crystalsc) Semiconductorsd) All32. Which of the following does not give Boraxbead test?a) Cu b) Crc) Ni d) Al33. The metal which is used in thermite processbecause of its activity is_______a) Iron b) Copperc) Aluminium d) Zinc34. Which of the following shows inert pair effect?a) Boron b) Carbonc) Silicon d) Tin35. Tincal is a mineral of____________a) Al b) Sic) B d) C36. Because of its ability to combine with bothoxygen and nitrogen, aluminium metal isused_________a) As nitrometerb) To remove air bubbles from molten metalc) To produce alloyd) All37. Silicon differ from silica by a group of_________a) CH3 b) –OHc) OCH3 d) O2
1538. Boron in soil has been considered essentialspecially for________a) Soil porosityb) Proper growth of plantsc) Alkalinity of soild) All39. Special feature of borate glass is that it is______a) Heat resistantb) Low meltingc) Used to prepare chemical gardend) All40. In p – block elements, the S – electrons ofouter shell of the heavier members are failedto participate in bonding, because theya) Remain paired b) Remain unpairedc) Are free d) None of these41. The tendency of the pair of S – electron toremain inert increase with the increase ina) Atomic number b) Atomic weightc) E.N d) I.P42. Boron does not easily form cations, because ithas the tendency to form bond like non-metala) Ionic bond b) Metallic bondc) Hydrogen bond d) Covalent bond43. Boron is metalloid and semiconductor likea) Be b) Kc) Si d) Al44. Which element is unstable in air and isoxidized superficially in aira) Aluminum b) Thalliumc) Gallium d) Indium45. Crystalline boron has structurea) Cubic b) Monoclinicc) Hexagonal d) Trigonal46. The hydrides B2H6 and Si2H6 are said toa) Ionic hydrides b) Complex hydridesc) Interstitial hydrides d) Covalent hydrides47. The compound, which is used in borax beadtest for cations analysis, isa) NaOH b) H3BO3c) Na2B4O7.10H2O d) H2B4O748. Orthoboric acid is weak acid because ita) Accepts OH-1ion b) Donate OH-1ionc) Accept H+1d) Donate H+149. The aqueous solution of which acid is used forwashing eyes?a) H2B4O7 b) HClc) H3BO3 d) HBO250. The process in which Bauxite is purified bydissolving it in 45% aqueous NaOH at 150oCto separate insoluble iron oxide as red mud iscalleda) Hall’s process b) Baeyer’s processc) Arrhenius process d) Grignard process51. Bauxite is an oxide mineral ofa) Cu b) Agc) Al d) Zn52. AlCl3 and GaCl3 are covalent when anhydrousbecausea) They belong to group III Ab) Their ions have small size and high chargec) They have high I.Pd) None of these53. In the electrolysis of alumina is mixed withCryolite (Na3AlF6) and fluorspar (CaF2) in theratio of 20 : 60 : 20. the function of the Cryoliteand fluorspar isa) To decrease the fusion temperature ofalumina and to make good conductor ofelectricityb) To dissolve aluminac) To dissolve sodiumd) To increase the ionization of alumina54. Termite is a mixture ofa) Iron oxide and aluminumb) Iron oxide and copperc) Copper oxide and aluminumd) None of these55. In aluminum termite process, aluminum actsas aa) Reducing agent b) Oxidizing agentc) A flux d) None of these56. Which aluminium alloy is extremely light?a) Duralumin b) Alnico
16c) Magnalium d) Aluminium bronze57. Cupric oxide on heating with B2O3 yields bluecolored beads in the oxidizing flame becausea) Cupric borates are white in colorb) Cupric borates are black in colorc) Cupric borates are green in colord) Cupric borates are blue in color58. In mordenting aluminium ions (Al+3) areprecipitated on the cloth asa) Al2O3 b) AlNc) Al(OH)3 d) AlCl359. Platinum metal can be dissolved ina) Hot con HClb) Hot con H2SO4c) Hot con HNO3d) A mixture of Con. HCl and con HNO360. Which of the following can form nitride, whichreact with water to give ammonia?a) Boron b) Galliumc) Indium d) Thallium61. The weak acid, which cannot be titrated withstandard alkies, isa) HCl b) H2SO4c) H3BO3 d) All of these62. Carbon differs from other members of itsgroup due to smaller atomic size, higherelectronegativity and the absence ofa) s – electrons b) p – electronsc) d – electrons d) All of these63. Aqua regia is a mixture of concentrated HNO3and concentrated HCl in the ratio ofa) 3 : 1 b) 1 : 3c) 2 : 3 d) 3 : 264. In land storage batteries, the acid used isa) Con HCl b) Dil HClc) Con H2SO4 d) Dil H2SO465. The dry ice is a compound ofa) Solid ice with any waterb) Solid SO2c) Solid CO2d) Solid C6H666. In the contact process for the manufacturing ofH2SO4, the catalyst used isa) Cu b) Nic) Pt d) N2O567. The depositing layer in tin plating isa) Cu b) Snc) Al d) Ni68. Ortho boric acid on heating at 100oC yieldsa) Meta boric acidb) Pyroboric acidc) Tetra boric acidd) Boric anhydride acid (B2O3)69. Which of the following is used in photographicfilm?a) MgBr2 b) NaClc) AgBr d) Na2S2O370. Aluminum does not react with HNO3 at anyconcentration and therefore HNO3 istransported in aluminum containers, this is dueto formation of protective layer ofa) Cupric oxide b) Ferric oxidec) Aluminum oxide d) Aluminum nitride71. Action of aqua regia on noble metals is due toa) HNO3 b) HClc) H2SO4 d) Chlorine72. Phosgene is a poisonous gas, its chemicalname isa) Carbon dioxide b) Phosphonyl chloridec) Carbon monoxide d) Carbonyl chloride73. The maximum inert pair effect is shown bya) B b) Alc) Ga d) Tl74. Quartz is the polymeric form ofa) (SiO2)n b) (CO2)nc) (CH2 – CH2)n d) None of these75. If a metal is protected by an oxide layer fromfurther attack, the metal is said to bea) Reactive b) Activec) Passive d) Attractive76. Carbon reacts with metals to forma) Hydrides b) Oxidesc) Hydroxides d) Carbide
1777. The control addition of III A and IV A membersin Silicon and Germanium is known asa) Inert pair effect b) Dopingc) Litharge d) Red lead78. P – type of semi conductor are formed bymixing Silicon or Germanium with members ofa) III A b) IV Ac) V A d) VI A79. Litharge is chemicallya) PbO b) PbO2c) Pb3O4 d) Pb(CH3COO)80. The Octet rule is not followed bya) Boron on BCl3 b) Oxygen in H2Oc) Nitrogen in NH3 d) Phosphorus in PH381. Which of the following elements showoxidation state of + 3 only?a) B b) Gac) In d) Ti82. ______ of the following is not metallic innature.a) Boron b) Aluminumc) Indium d) Thallium83. The oxides of Boron are ______ in nature.a) Acidic b) Basicc) Neutral d) None of these84. Orthoboric acid on heating to about 100oClooses a water molecule to form ______a) Metaboric acidb) Pyroboric acidc) Metaboric and pyroboric acidd) None of these85. The function of Fluorspar in the electrolyticreduction of alumina dissolved in fused cryolite(NA3 AlF6) isa) As a catalystb) To lower the temperature of the melt and tomake the fused mixture conducting.c) To decrease the rate of oxidation of carbonat the anode.d) None of the above86. Which of the following statements is correct?a) H3PO3 is dibasic and reducingb) H3PO3 is tribasic and reducingc) H3PO3 is tribasic and non – reducingd) H3PO3 is dibasic and non – reducing87. Boric acid isa) Weak monobasic Lewis acidb) Only weak monobasic Arhenius acidc) Only weak monobasic Bronsted acidd) Only weak tribasic Arrhenius acid88. The reduction of metal oxides is sometimesaccomplished by using aluminum in the______a) Goldschmidt’s reactionb) Silberchemdit’s reactionc) Baeyer’s reactiond) Zilch’s reaction89. Hall’s process is based on electrolysis of_____a) Alumina b) Gypsumc) Borax d) None of these90. _______ is a better conductor of heat.a) Fe b) Snc) Al d) None of these91. Al2O3 formation involves evolution of a largerquantity of heat which makes its uses in_______a) Deoxidizer b) Confectionaryc) Indoor photography d) Thermite welding92. In the commercial electrochemical process froaluminum extraction, the electrolyte used isa) Al(OH)3 in NaOH solutionb) An aqueous solution of Al2(SO4)3c) A molten mixture of Al2O3 and Na3AlF6d) A molten mixture of AlO(OH) and Al(OH)393. Borax is prepared by treating colemanite witha) NaNO3 b) NaClc) NaHCO3 d) Na2CO394. Elements, which exist in two or more physicalor molecular forms, are called _______a) Isotopes b) Allotropesc) Isobars d) None of these95. PbO behaves as a/an _______a) Amphoteric oxide b) Basic oxidec) Super oxide d) Sub oxide
1896. The number and type of bonds between twocarbon atoms in CaC2 area) One sigma and one pi bondb) One sigma and two pi bondsc) One sigma and one and a half pi bondd) One sigma bond97. Aluminum is diagonally related toa) Li b) Sic) Be d) B98. Which of the following halides is least stableand has doubtful existence?a) Cl4 b) SnI4c) GeI4 d) PbI499. In which of the following phosphorus has anoxidation state of + 4?a) P4O6 b) P4O8c) P4O9 d) None of theseCHAPTER # 4Group V and VI Elements1. Out of all the elements of group VA the highestionization energy is possessed.(A) N (B) P(C) Sb (D) Bi2. In group VA elements the mostelectronegative elements is.(A) Sb (B) N(C) P (D) As3. Oxidation of NO in air produced.(A) NO2 (B) N2O3(C) N2O4 (D) N2O54. The brown gas is formed when metal reducesHNO3(A) N2O5 (B) N2O(C) NO2 (D) NO5. Laughing gas is chemically(A) NO (B) N2O(C) NO2 (D) N2O46. Out of all the elements of group IVA thehighest melting and boiling point is shown bythe elements;(A) Te (B) Se(C) S (D) Pb7. SO3 is not absorbed in water directly to formH2SO4 because.(A) The reaction does not go to completion(B) The reaction is quite slow(C) The reaction is exothermic(D) SO3 is insoluble in water8. Which catalyst is used in contact process?(A) Fe2O3 (B) V2O5(C) SO3 (D) Ag2O9. Which of the following specie has themaximum number of unpaired electrons.(A) O2 (B) O2+
19(C) O2-(D) O2-210. Nitrogen and phosphorus of group VA showthe typical properties of(A) Metals (B) Non-Metals(C) Both of the above (D) None of the above11. Arsenic and antimony are(A) Metals (B) Non-Metal(C) Metalloids (D) None of the above12. The common valencies of the group VAelements are(A) Two to three (B) Three and five(C) One and five (D) Two and four13. Nitrogen is present in free state in air as amajor constituent about.(A) 58% (B) 38%(C) 70% (D) 78%14. Common oxides of nitrogen are(A) N2O, NO and NO2(B) NO, NO2(C) N2O, NO2(D) N2O, NO, NO2, N2O3 & N2O515. Di-Nitrogen oxide is a colourless gas.(A) With a faint pleasant smell and a sweetishtaste.(B) With unpleasant smell and bitter taste.(C) With pleasant smell and bitter taste.(D) With unpleasant smell and sweetish16. Nitric acid is used for.(A) Making varnishes and Organic dyes(B) For making organic dyes(C) Making varnishes(D) For making varnishes, organic dyes,explosives nitrogen fertilizers etc.17. Allotropes of phosphorus are of(A) Three types (B) Four types(C) Two types (D) Six different types18. In combined state nitrogen is found in all livingmatter including.(A) Animals and plants as proteins urea andamino acids.(B) In plants only(C) In animals only(D) None of the above19. All the elements of grown VIA are non-metalsexcept.(A) S (sulphur) (B) O (oxygen )(C) PO (pollinium ) (D) Te (tellurium)20. In group VIA the radioactive metal is(A) Te (tellurium) (B) O (oxygen)(C) N (nitrogen) (D) None of the above21. Oxygen has allotropic forms such as.(A) Three (B) Four(C) Two (D) Five22. Oxygen is comprising about .(A) 30% of earths crust(B) 20% of earths crust(C) 10% of earths crust(D) 50% of earths crust23. In the atmosphere the free oxygen occursabout(A) 1/3 of the atmospheric air(B) 1/2 of the atmospheric air(C) 1/4 of the atmospheric air(D) 2/3 of the atmospheric air24. Water contains nearly combined form ofoxygen(A) 50% (B) 70%(C) 30% (D) 89%25. Sulphur exist as(A) Free and combined state(B) Only in free state(C) Combined state(D) None of the above26. Which of the following possesses melting pointbelow 0˚C?a) Nitrogen b) Phosphorusc) Carbon d) Bismuth27. Formation of H2SO4 by Contact process is anexample of ________a) Homogenous equilibriumb) Heterogenous equilibriumc) Sulphonationd) Dilution28. Which of the following does not contain
20phosphorus?a) Yolk of egg b) Bonec) Nerves d) Steel29. Which of the following elements can followextended octet rule?a) P b) Cc) B d) N30. The composition of brown ring in nitrate test is________a) FeSO4.NO b) FeSO4.NO2c) FeSO4.NO3 d) None of above31. Which one of the following compounds smellslike garlic?a) P2O3 b) P2O5c) H3PO3 d) All have same smell32. All the elements in group VIAare______________a) Hygroscopic b) Metalsc) Polymeric d) All of above33. Phosphoric acid is a weak acid and its basicityis_______a) 1 b) 3c) Zero d) 1 & 334. The nitrogen gas present in air isa) More b) Less reactiveb) Non reactive d) Moderatory reactive35. The properties of Nitrogen is different fromother members of its group toa) Small atomic size and high E.Nb) Single screening shellc) Absence of d – orbital in the valence shelld) All of these36. Nitrogen can not as a central metal atom in acomplex because it can nota) Devote electrons b) Accepts electronsc) Form an ion d) All of these37. Which oxides of nitrogen exist in solid state?a) N2O b) NOc) NO2 d) N2O538. The test which is used to confirm the presenceof nitrate isa) Silver minor test b) Ring testc) Tollen’s test d) Baeyer’s test39. Nitric oxide hasa) Unpaired electronsb) Odd number of electronsc) Paramagneticd) All of these40. Mixture of HNO3 and NO2 is calleda) con HNO3 b) dil HNO3c) fuming HNO3 d) HNO341. Which one PX5 is unknown?a) PCl5 b) PBr5c) PF5 d) Pl542. Orthophosphorous acid is aa) Monobasic acid b) Dibasic acidc) Tribasic acid d) Base43. Galena is an ore ofa) S b) Tec) Po d) Mg44. White phosphorous occurs in the form ofa) Monoatomic moleculeb) Diatomic moleculesc) Triatomic moleculesd) Tetra atomic molecules45. The acid which has garlic like smell and iscrystalline deliquescent isa) H2SO4 b) HClb) H3BO3 d) HNO346. The acid which forms three series of salt isa) H2SO4 b) H3BO3c) H3PO4 d) HNO347. Removal of arsenic oxide is very essentialbecause it acts as aa) Catalyst b) Activatorc) Catalytic poison d) Co-enzyme48. The structure of H2SO4 isa) Trigonal b) Octahedralc) Tetrahedral d) Hexagonal49. Which pair does not produce H2 gas?
21a) Cu and Con HNO3b) C2H5OH and Na metalc) Mg and steamd) Phenol and sodium metal50. Why it is difficult to form nitrogen compoundsfrom gaseous nitrogena) All its reactions are endothermicb) The bond dissociationc) It contain triple bondd) Its first ionization energy is very high51. The elements which is essential in nitrogenfixation isa) Zn b) Moc) Fe d) S52. Which one act as a free radical?a) CO2 b) CH4c) NO d) BF353. The starting material in Birkland and Eydeprocess for manufacturing of HNO3 isa) NH3 b) NO2c) Air d) NaNO354. In making safety matches we usea) White phosphorusb) Gray phosphorusc) Violet phosphorusd) Red phosphorus55. Which is most stable isotope of sulphur?a) Plastic sulphur b) Monoclinic sulphurc) Rhombic sulphur d) Colloidal sulphur56. ConsiderNH4NO3 heatinggentleProductThe product formed isa) N2O b) N2c) NO d) N2O357. The product formed by heating mixture of NOand NO2 area) N2O5 b) N2O4c) N2O d) N2O358. Nitric oxide is prepared by the action of HNO3ona) Fe b) Cuc) Zn d) Sn59. On industrial scale Nitric acid is prepared by_______a) Dutch Processb) Birkland-Eyde’s Processc) Solvay’s Processd) Down’s Process60. In Ostwald’s Process the substance used tooxide ammonia is ______a) Zn b) Ptc) CO d) None of these61. Copper reacts with dilute nitric acid to forma) Nitric oxide b) Nitrogen peroxidec) Nitrous Oxide d) None of these62. By _______ process the H2SO4 produced ispure and can be produced of any desiredstrength.a) Lead Chamber Processb) Contact Processc) Down’s Celld) None of these63. Concentrated sulphuric acid acts as a ______a) Reducing agent b) Oxidizing agentc) Dehydrating agent d) None of these64. In group VI A highest electronegativity is fora) S b) Oc) Pb d) Se65. Rhombic sulphur consists of _______a) S8 chain b) S2 chainsc) S4 rings d) S8 rings66. The number of hydroxyl group inphrophosphoric acid isa) 3 b) 4c) 5 d) 767. When liquid sulphur at one atmosphericpressre is very slowly cooled, unless supercooling occurs, the first solid to appear is_______a) Monoclinic sulphur b) Rhombic sulphurc) Hexagonal sulphur d) Metallic sulphur68. _______ is obtained when ammoniumdichromate is refrigerant?a) Nitrogen b) Oxygenc) Ammonia d) None69. Which compound acts as an oxidizing as well
22as a reducing agent?a) SO2 b) MnO2c) Al2O3 d) CrO370. Which of the following acids does notinvolveS – S bond?a) Phyrosulphrous acidb) Dichotomous acidc) Dichotic acidd) Pyrosulphuric acid71. Oleum is formed by combining H2SO4 witha) SO2 b) SO3c) S d) H2S72. When SO2 is passed through an acidifiedKMnO4 solutiona) KMnO4 is oxidizedb) KMnO4 is reducedc) SO2 is reducedd) KMnO4 solution turns greenCHAPTER # 5Halogens and Noble Gases1. Which is the most volatile compound?(A) HI (B) HCI(C) HBr (D) HF2. Which one is the anhydride of HCIO4 ?(A) CI2O (B) CIO2(C) CI2O6 (D) CI2O73. Which of the following halogens does not formits oxyacids ?(A) Fluorine (B) Chlorine(C) Bromine (D) Iodine4. Bromine is obtained on a commercial scalefrom(A) Caliche (B) Carnallite(C) Common salt (D) Cryolite.5. Iodine deficiency in diet is known to cause(A) Beriberi (B) Goitre(C) Rickets (D) Night blindness6. Which one of the halogen acid is a liquid ?(A) HF (B) HCI(B) HBr (D) HI.7. Which of the following acid is weakest(A) HCIO (B) HBr(C) HCIO3 (D) HCI.8. In which of the following, oxygen has +2oxidation number ?(A) F2O (B) CI2O(C) Na2O2 (D) Na2O.9. Fluorine does not show positive oxidationstates due to the absence of
23(A) d-orbitals (B) s-orbitals(C) p-orbitals (D) None10. Which of the following has greatest reducingpower?(A) HI (B) HBr(C) HCI (D) HI.11. Bad conductor of electricity is(A) H2F2 (B) HCI(C) HBr (D) HI12. Bleaching power is obtained by the actionchlorine gas and(A) Dilute solution of Ca(OH)2(B) Concentrated solution of Ca(OH)2(C) Dry CaO(D) Dry slaked lime.13. Mark the element which shows only oneoxidation state in its compounds(A) F (B) CI(C) Br (B) I.14. Which of the following halogens has thehighest bond energy ?(A) F2 (B) CI2(C) Br2 (D) I2.15. Which halogen is most electropositive ?(A) F (B) CI(C) Br (D) I.16. Which one of the following is the true covalentoxide of iodine ?(A) I2O4 (B) I2O5(B) I2O7 (D) I2O917. Which of the following halogen oxides is ionic?(A) CIO2 (B) BrO2(C) I2O5 (D) I4O918. Which of the following hydrogen halide has thehighest boiling point ?(A) HF (B) HCI(C) HBr (D) HI.19. Which of the following is a false statement ?(A) Hydrogens are strong oxidizing agents(B) Halogens show only –1 oxidation state(C) HF molecules form intermolecularhydrogen bonding(D) Fluorine is highly reactive.20. As the atomic number of halogens increases,the halogens(A) Lose the outermost electrons less readily(B) Become lighter in colour(C) Become less denser(D) Gain electrons less readily.21. Which statement is correct about halogens ?(A) They are all diatomic and form univalentions(B) They are all capable of exhibiting severaloxidation states(C) They are all diatomic and form divalent ion(D) They can mutually displace each otherfrom the solution of their compounds withmetals.22. Which has the highest molar heat ofvaporization ?(A) HF (B) HCI(C) HBr (D) HI.23. Which one of the following reacts with glass ?(A) H2SO4 (B) HF(C) HNO3 (D) K2Cr2O724. Strongest hydrogen bonding is shown by(A) Water (B) Ammonia(C) Hydrogen fluoride (D) Hydrogen sulphide.25. Fluorine is a better oxidizing agent than Br2. Itis due to(A) Small size of fluorine(B) More electron repulsion in fluorine(C) More eletronegativity of fluorine(D) Non metallic nature of fluorine.26. The element which liberated O2 from water is(A) P (B) N(C) F (D) I.27. Ozonised oxygen can be obtained from H2Oby the action of(A) Conc. H2SO4 (B) KMnO4(C) MnO (D) F228. Which one of the following is most basic ?
24(A) F-(B) CI-(C) Br-(D) I-29. Which one of the following elements can haveboth positive and negative oxidation state?(A) F (B) I(C) Li (D) He.30. Least chemical activity is shown by(A) NH3 (B) CH4(C) Ar (D) H2SO4.31. In discharge tube, noon glows(A) Bluish (B) Reddish(C) Pinkish (D) Greenish32. Xef2 molecule is(A) Linear (B) Trigonal planar(C) Pyramidal (D) Square planar.33. The forces acting between noble gas atomsare(A) Vander Waals forces(B) Ion-dipole forces(C) London disperslon forces(D) Magnetic forces.34. Percentage of Ar in air is about(A) 1% (B) 2%(C0 3% (D) 4%35. The structure of XeF6 is(A) Distorted octahedral(B) Pyramidal(C) Tetrahedral(D) None of the above36. The noble gas was first time discovered by(A) Cavendish (B) William Ramsay(C) Lockyer (D) Frankland.37. The coloured discharge tubes foradvertisement mainly contain(A) Xenon (B) Helium(B) Neon (D) ARGON38. Which of the following noble gases does nothave an octet of electrons in its outermostshell ?(A) Neon (B) Radon(C) Argon (D) Helium39. The lowest boiling point of helium is due to its(A) Inertness(B) Gaseous nature(C) High Polaris ability(D) Weak Vander Waals forces b/w atoms40. Which member of group VII A combines withone more halogen?a) Cl b) Fc) Br d) I41. The interhalogen formed by iodine requiresfluorine atomsa) 3 b) 5c) 7 d) 842. Which one halogen directly reacts with noblegas?a) F b) Clc) Br d) I43. Which type of interhalogenis formed byBromine?a) Br – Cl b) Br – F3b) Br – F5 d) Br – I 744. Iodine occurs as iodate ina) Chile salt peter b) Clauber’s saltc) Blue vitriol d) Oil of vitriol45. Which one hydride has greater ionic characterand had H – bond?a) HF b) HBrc) HCl d) HI46. Chlorine reacts with hot solution of NaOH toforma) NaCl b) NaClO3c) NaClO d) All of these47. Fluorine directly combines with noble gasesa) Kr b) Xec) Rn d) All of these48. The density of pure liquid HF is less thenwater due toa) Covalent bond formationsb) High electron affinity
25c) Absence of three dimensional net work ofH – bondd) Presence of three dimensional net work ofH – bond49. The order of increasing dissociation of HX at1000oC isa) HI (33%) > HBr (0.5%) > HCl (0.014%) >HF (0%)b) HBr > HI > HF > HClc) HCl > HBr > HI > HFd) HF > HCl > HBr > HI50. The halogen which form unstable oxides isa) F b) Clc) Br d) I51. The most recently prepared oxyacid ofhalogen isa) HOCl b) HBrO3c) HIO d) HOF52. The increasing order of acidity and oxidizingpower of Oxyacids due to increasing numberof oxygen atoms isa) HXO > HXO2 > HXO3 > HXO4b) HXO4 > HXO3 > HXO2 > HXOc) HXO3 > HXO2 > HXO4 > HXOd) None of these53. The average available chlorine in bleachingpowder isa) 30 – 35% b) 35 – 40%c) 40 – 45% d) 45 – 50%54. Which one is false for bleaching powder?a) Highly soluble in waterb) Light yellow color powderc) Oxidizing agentd) Release Cl2 gas by reaction with diluteacids55. Sea weeds are important sources ofa) F b) Clc) Br d) I56. The acid used for etching glass isa) HCl b) HFc) HNO3 d) HClO457. Which one interhalogen can further combinewith fluorine?a) F – Cl b) ClF3c) BrF5 d) IF558. Which statement is true?a) Except F2O, the oxides of all halogen areendothermic compoundsb) The higher oxides of halogen are morestable than lower oxidesc) The bond in the halogen oxides are largelycovalent due to similarities inelectronegativityd) All of these59. Iodine is highly soluble ina) Solution of Kl b) Alcoholc) CS2 d) All of these60. HF is not preserved in glass bottle becausea) It reacts with SiO2 of the glassb) It reacts with the Al2O3 of the compositionc) It reacts with the Na2O of the compositiond) It reacts with the visible part of light61. Fluorine can be transported in a specialcontainer made up ofa) Aluminum b) Steelc) Glass d) Carbon steel62. Chlorine can be easily liquefied and is usuallymarketed ina) Steel cylindersb) Iron cylindersc) Carbon steel cylindersd) Glass cylinders63. Halogen do not occur free in nature becausetheya) Are salt producerb) Are highly reactivec) Has seven electrons in their valence shelld) Are non metals64. Xenon trioxide is formed bya) Hydrolysis of xenon hexafluorideb) Hydrolysis of barium per xenatec) Hydrolysis of xeondiflorided) None of these65. The known fluorides of xenon area) XeF2 b) XeF4c) XeF6 d) All of the above66. Mixture of 80% helium and 20% oxygen isused for
26a) Breathing air by seas diversb) Breathing by patientc) Breathing by fishesd) All of these67. Tyres of large aeroplane containa) He b) Nec) Ar d) Kr68. Which xenon fluoride is impossible?a) XeF2 b) XeF4c) XeF6 d) XeF369. The type of hybridization does the oxygen hasin OF2 isa) SP2b) d2SP3c) SP3d) dSP370. The gas that will liquefy with most difficulty isa) He b) CO2c) NH3 d) SO271. Which of the following is radioactive?a) Cl b) Brc) I d) At72. The electron affinity of halogens is of the ordera) F < Cl > Br > I b) F < Cl < Br < Ic) Cl < F < Br < I d) I < Br < F < Cl73. Which of the following hydride of halogen isthermally most stable?a) HF b) HClc) HBr d) HI74. In which of the following bromine has anoxidation state of + 4?a) Br2O b) BrO2c) BrO3 d) None75. Electrolysis of Brine produces _______a) Chlorine b) Oxygenc) H2S d) Nitrogen76. In which of the following oxyacids, chlorine hasan oxidation state of +3?a) HClO b) HClO2c) HClO3 d) HClO477. The process based on the oxidation ofhydrochloric acid with oxygen is ______a) Nelson’s cell b) Contact processc) Down’s process d) Deacon’s process78. Chlorine gas is ______ in color.a) Yellow b) Greenish Yellowc) Violet d) Blue79. To kill bacterial, moist of the drinking water istreated with _______a) Nitrogen b) Carbon dioxidec) Chlorine d) Hydrogen sulphide80. Phosgene is the common name of _______a) Carbon dioxide and phosphateb) Phosphoryle chloridec) Carbonyle chlorided) Carbon tetrachloride81. Hydrofluoride acid is _________a) A powerful oxidizing agentb) A weak acidc) A strong acidd) A good reducing agent82. Bleaching powder is obtained by theinteraction of Cl2 and _______a) Slaked limeb) Conc. Solution of Mg(OH)2c) Dry CaOd) Dry slaked lime83. The element which liberates O2 form water isa) P b) Nc) F d) I84. Which forms maximum compounds withxenon?a) F b) Clc) Br d) I85. Which of the following rare gases is notpresent in the atmosphere?a) He b) Xec) Kr d) Rn86. The structure of XeOF4 isa) Tetrahedral b) Square pyramidalc) Distorted d) Irregular pentagonal
2787. Which of the following fluorides of xenon is notobserved?a) Xef b) XeF2c) XeF4 d) XeF6CHAPTER # 6.Transition Elements1. Which of the following is a non-typicaltransition element ?(A) Cr (B) Mn(C) Zn (D) Fe2. Which of the following is a typical transitionmetal ?(A) Sc (B) Y(C) Ra (D) Co3. f-block elements are so called.(A) Non-typical transition element(B) Outer transition elements(C) Normal transition elements(D) Inner transition4. The strength of binding energy of transitionelements depends upon(A) Number of electron pairs(B) Number of unpaired electrons(C) Number of neutrons(D) Number of protons5. Group VIB of transition elements contains(A) Zn, Cd , Hg (B) Fe, Ru, Os(C) Cr, Mo, W (D) Mn, Te, Re6. Which is the formula of tetra-amine chloronitro platinum (IV) sulphate ?(A) [Pt(NH3)4(NO2)]SO4(B) [Pt NO2CI (NH3)4]SO4(C) [Pt CI (NO2)(NH3)]SO4(D) [Pt (NH3)4(NO2)CI]SO47. The percentage of carbon in different types ofiron products is in the order of .(A) Cast iron > wrought iron > steel(B) wrought iron > steel > cast iron(C) cast iron > steel > wrought iron(D) cast iron = steel > wrought iron8. The colour of transition metal complexes isdue to.(A) d-d transitions of electrons(B) Para magnetic nature of transition element(C) Ionization(D) Loss of s-electrons9. Coordination number of Pt in[t CI (NO2)(NH3)4]-2 is.(A) 2- (B) 4(C) 1 (D) 610. The total number of transition elements is.(A) 10 (B) 14(C) 40 (D) 5011. Transition metals have very high melting andboiling points due to.(A) Weak binding forces(B) Strong binding forces(C) Both of the above(D) None of the above12. Substances which are weakly attracted bywhich type of force are called as paramagneticsubstances.(A) Weak magnetic field(B) Strong magnetic field(C) Feeble magnetic field(D) None of the above13. The diamagnetic substances are(A) Weakly repelled by a strong magnetic field(B) Strongly repelled by a weak magnetic field(C) Strongly repelled by a weak magnetic field(D) Weakly repelled by a weak magnetic field.14. Paramagnetic behaviour is caused by thepresence of.(A) Unparied electrons(B) Paired electrons(C) Paired protons
28(D) Paired electrons in an aton, molecule orion15. The transition elements includes.(A) Ti, Fe, Cr, Ni, Cu etc(B) Ti, Fe, Nb, Ta, Th, etc(C) Mo, W, Zr, Nb, etc(D) Ti, Fe, Ci, Ni, Cu, Mo, W, Zr, Nb, Ta, Th,etc16. Zn has(A) Zero unpaired electrons(B) Five unpaired electrons(C) Three unpaired electrons(D) One paired electrons17. In transition elements the orbital which isresponsible for the colour development is.(A) s-orbital (B) f-orbital(C) d-orbital (D) o-orbital18. In [Ti (H2O6)]3+ which wavelength of light isabsorbed.(A) Yellow light is absorbed while blue and redlight are transmitted(B) Green light is absorbed(C) Both of the above(D) None of the above19. Alloy steels are(A) Iron atoms substituted by Cr, Mn, and Niatoms(B) Iron atoms substituted by Cr, and Mnatoms(C) Iron atoms substituted by Mn and Ni atoms(D) None of the above20. Such compounds containing the complexmolecules or complex ions and capable of.(A) Dependent existence are calledcoordination compounds(B) Independent existence are calledcoordination compound(C) None of the above(D) A & B21. A complex compound may contain(A) Simple catoins and a complexions(B) A complex cations and a simple anion(C) Both of the above(D) None of the above22. The nomenclature of complex compounds isbased upon the recommendation by the(A) Inorganic Nomenclature Committee(IUPAC)(B) Organic Nomenclature Committee (IUPAC)(C) Both of the above(D) None of the above23. In writing the formula of a complex ion theusual practice is to place the symbol of the(A) Central metal atom second(B) Central metal atom third(C) Central metal atom 4rth(D) Central metal atom 1st24. Pig iron or cast iron contains(A) 0.25% to 2.5% carbon(B) 2.5% to 4.5% carbon(C) 0.12% to 0.25% carbon(D) None of the above25. Wrought iron is manufactured from(A) Pig iron (B) Cast iron(C) Pig iron or cast iron (D) Steel26. In open hearth process for the manufacturingof steel.(A) Using cast iron, wrought iron, or steelscrap(B) Using cast iron(C) just wrought iron(D) None of the above27. In galvanic cell.(A) Al does not releases electrons andchanges to al+3ion(B) Ai releases and changes to Al+3ion(C) Both of the above(D) Both of the above28. The amount of iron destroyed each year bycorrosion equal to.(A) About 1/4th of its annual production(B) About 1/3rd of its annual production(C) Both 1/2nd of its annual production(D) None of the above29. Almost all the chromates are(A) Blue in colour (B) Green in colour(C) Red in colour (D) Yellow in colour30. K2Cr2O7(potassium dichromate) is usedextensively for.(A) Dyeing
29(B) Chrome tanning(C) As an oxidizing agent(D) All of the above are true31. The location of transition elements is inbetween_________a. Lanthanides & actinidesb. s and p block elementsc. chalcogens and halogensd. d and f block elements32. Compounds attracted by applied magneticfield are called________a) Diamagnetic b) Paramagneticc) Good conductor d) Ferromagnetic33. When light is exposed to transition element,then electrons jumps from lower orbitals tohigher orbitals in___________a) f-orbitals b) s-orbitalsc) p-orbitals d) d-orbitals34. The specie which donates electrons to centralmetal atom in co-ordination sphere is called________a) Anion b) Cationc) Ligand d) Acid35. Following ion is a bidentate Ligand?a) Ammonia b) Oxalatec) Carbonyl d) Cyanide36. The central atom along with Ligand is called________a) Complex ion b) Coordination spherec) Ligand d) Complex compound37. Geometry of complex compounds dependsupon_________a) no. of ligandb) no. of chelatesc) hybridization of central metald) All of above38. For sp3d2 hybridization, the expectedgeometry will be_________a) Tetrahydral b) Square planarc) Trigonal bipyramidal d) Octahedral39. Any process of chemical decay of metals dueto action of surrounding medium is called_________a) Surrounding b) Enamelc) Corrosion d) Coating40. When an active metal like Al come in contactwith less active element like Cu, then itproduces _____a) Voltaic cell b) Galvanic cellc) Electrolytic cell d) a & b41. Which element has complete d – orbital area) Ni b) Fec) Zn d) Mn42. In Ag2+the number of electrons in 4 d orbital isa) 7 b) 8c) 6 d) 943. A regular decrease in ionic and atomic radiiacross the lanthanides is calleda) Contractionb) I.Pc) Lanthanide Contractiond) Complex formation44. The magnetic moment can be measured bya) Gouy’s balance b) Haber’s balancec) Down’s balance d) All of these45. The magnetic moment is related to the numberof unpaired electrons (n) by the equationa) 2nn b) )2( nnc) 2nn d) )2( nn46. Diamagnetic compounds are those which havea) Paired electrons b) Unpaired electronsc) Free electrons d) No electrons47. An extreme case of Para magnetism is calleda) Diamagnetism b) Ferro magnetismc) Isomerism d) None of these48. The number of ligands attached to the centralmetal atom or ion, usually varying froma) 2 to 3 b) 2 to 4c) 2 to 6 d) 2 to 749. Co-ordinate compound with co-ordinate sixnumber have geometrya) Tetrahedralb) Square plannerc) May be tetrahedral or square plannerd) Octahedral50. Steel is an alloy of iron and is classified into
30a) Mild steel (0.1 – 0.2%C) and mediumcarbon steel (0.2 to 0.7%C)b) Medium carbon steel (0.2 to 0.7%C) andhigh carbon steel (0.7 to 1.5%C)c) Mild and high carbon steeld) Mild medium and high carbon steel51. Ligands are classified intoa) One b) Twoc) Three d) Five52. EDTA isa) Monodentate b) Bidentatec) Polydentate d) None of these53. Which one is Bidentate liganda) Cl-1b) NH3c) NH2(CH2), NH2 d) EDTA54. Complexes which are less common have co-ordination numbera) 4 b) 5c) 6 d) All of these55. Complexes which have octahedral geometryhybridizeda) SP3b) dSP2c) dSP3d) d2SP356. The geometry of a complex depends upona) Co-ordination numberb) Type of hybridization of central metal atomc) Chelatesd) Both a & b57. Brass contain 20% zinc anda) 80% Cu b) 70% Cuc) 60% Cu d) 50% Cu58. Bell metal containsa) 80% Cu + 20% Znb) 80% Cu + 20% Snc) 20% Cu + 80% Znd) 20% Cu + 80% Sn59. The formula of blue vitriol isa) CuSO4 b) CuSO4.3H2Oc) CuSO4.4H2O d) CuSO4.5H2O60. The transition elements usually have very______ melting and boiling points.a) Low b) Highc) Intermediate d) None of these61. Finely divided iron is used in _______a) Haber processb) Catalytic Hydrogenationc) Oxidation of ammonia to nitric oxided) Contact process62. ________ reagent can be used to identifyCu2+ion.a) Nitric acid b) Sulphuric acidc) Sodium hydroxide d) Potassium dichromate63. _______ is the important ore of copper.a) Malachite b) Bauxitec) Blue Vitriol d) Alumina64. Titanium is used as catalyst in _______a) Haber processb) Catalytic hydrogenationc) Oxidation of ammonia to nitric acidd) Polymerization of ethyle into polyethylene65. An adding KI to a solution of CuSO4a) Cupric oxide is precipitatedb) Metallic copper is precipitatedc) Cuprous iodide is precipitated with theliberation of iodined) No change takes place66. In Cr2O72every Cr atom is linked toa) Two O atoms b) Three O atomsc) Four O atoms d) Five O atoms67. A substance which have even number ofelectrons and have paired spin is called______a) Ferromagnetic b) Paramagneticc) Dimagnetic d) None of these68. The empty spaces between atoms of transitionmetals in their crystal lattices are called _____a) Vacant spaces b) Valence spacesc) Interstices d) None of these69. [Ni(CN)4]2-is an example of ________a) Square planar
31b) Tetrahedral complexesc) Octahedral complexesd) None of these70. [Cu(NH3)4]2+is an example of _______a) Square planarb) Tetrahedral complexesc) Octahedral complexesd) None of these71. [Co(NH3)6]3+is an example of _______a) Square planarb) Tetrahedral complexesc) Octahedral complexesd) None of these72. The names of ______ are usually unchanged.a) Anionic ligands b) Cationic ligandsc) Neutral ligands d) None of these73. The suffix “ate” at the end of the name of thecoordinate complex ion represents a/an______a) Cation b) Anionc) Cathode b) Anode74. Ferric oxide is _______a) A basic anhydrideb) An acid anhydridec) An amphoteric anhydrided) Green in colour75. The most strongly ferromagnetic element is_______a) Fe b) Coc) Ni d) Os76. The property of a substance which permits itbeing drawn into wire is called ________a) Softness b) Ductilityc) Brittleness d) Hardness77. When potassium permanganate is added to asaturated aqueous solution of potassiumhydroxide, _______ gas is evolved.a) Hydrogen b) Oxygenc) Carbon dioxide d) None of these78. AgCl dissolves in u solution of NH3 but not inwater because;a) NH3 is a better solvent than H2Ob) Ag+forms a complex ion with NH3c) NH3 is a stronger base than H2Od) Dipole moment of water is higher than NH379. Which of the following is deliquescent?a) ZnCl2 b) Hg2Cl2c) HdCl2 d) HgCl280. CrO3 dissolves in aqueous NaOH to givea)24CrO b) Cr(OH)2c)272OCr d) Cr(OH)381. Iron obtained from the blast furnace is calleda) Pig iron b) Cast ironc) Wrought iron d) SteelCHAPTER # 7Fundamental Principles of Organic Chemistry1. The state of hybridization of carbon atom inmethane is(A) Sp3 (B) Sp2(C) Sp (D) dsP22. In t-butyl alcohol, the tertiary carbon is bondedto(A) Two hydrogen atoms(B) Three hydrogen atoms(C) One hydrogen atoms(D) No hydrogen atoms3. Which set of hybrid orbitals has planartriangular shape(A) Sp3 (B) Sp(C) Sp2 (D) dsp24. The chemist who synthesized urea fromammonium cyanate was(A) Berzelius (B) Kolbe(C) Wholer (D) Lavoisier5. Linear shape is associated with which set ofhybrid orbitals ?(A) Sp (B) Sp2(C) Sp3 (D) dsp2
326. A double bond consists of.(A) Two sigma bond(B) One sigma and one pi bond(C) One sigma and two pi bond(D) Two pi-bond7. Ethers show the phenomenon of(A) Position isomerism(B) Functional group isomerism(C) Metamerism(D) Cis-trans isomerism.8. Select from the following the one which isalcohol.(A) CH3 --------CH2--------OH(B) CH3---------O-----------CH3(C) CH3COOH(D) CH3--------CH2--------Br9. Early chemists recognized organic compoundsdistinct from inorganic compounds because of(A) The difference in their origin andproperties(B) The similarities in their origin butdifference in their propertied(C) Both of the above(D) None of the above10. The vital force theory was rejected byA) Jhon Dalton B) Friedrick WohlerC) Dmitri Mendeleev D) None of the above11. We have become dependent for our foodmedicines and clothing to which compounds.(A) Inorganic compounds(B) Organic compounds(C) Both of the above(D) None of the above12. Natural Gas is a(A) Mixture of hydrocarbons(B) Methane(C) Both of the above(D) Nonn of the above13. In Pakistan the natural gas is used for.(A) For power generation only(B) In coment and fertilizer industries only(C) As a fuel in general industries and fordomestic purposes(D) All of the above are truce14. At what temperature coal is heated in theobserve of air for converting it into coke, coalgas, and coal tar(A) Temperature ranging from 500-1000oC(B) Temperature ranging from 100-1000oC(C) Temperature ranging from 300-2000oC(D) Temperature ranging from 1000-3000oC15. Cracking of petroleum is taken place byA) Thermal cracking B) Catalytic crackingC) Steam cracking D) All of the above16. The structure of alkynes can be explained byyet another mode of hybridization called as(A) Sp2 hybridization(B) Sp3 hybridization(C) Sp5 hybridization(D) Sp hybridization17. Metamerism aries due to the.(A) Equal distribution of carbon atoms(B) Unequal distribution of carbon atoms(C) Both of the above are true(D) None of the above are true18. Cis-trans isomerism is also called as(A) Geometric Isomerism(B) Position Isomerism(C) Chain Isomerism(D) Metamerism19. Coal, petroleum and natural gas are importantsources of.(A) Organic compounds(B) Inorganic compounds(C) Both of the above(D) None of the above20. Organic compounds are classified into(A) Acyclic and cyclic compound(B) Acyclic & Heterocyclic(C) Non-cyclic(D) All of the above21. Rate of reactions of most organic compoundsare___________
33a) Very slowb) Very fastc) Mediumd) No regular character present22. Coal is produced after a long time decay of__________a) Animals b) Fossilsc) Wood d) Ores23. Ether functional group can be representedas____________a) –OH b) R-CO-Rc) R-O-R d) R-COOH24. 2-propanol can show isomerism as _______a) Metamerismb) Functional group isomerismc) Geometric isomerismd) None of above25. The hydrocarbons which give smoke onburning is called________a) Aliphatic b) Aromaticc) Carboxylic acid d) Aldehydes26. In sp3 hybridization, the geometry ofmolecules will be_________a) Square planar b) Trigonal pyramidalc) Tetrahedral d) All are possible27. Only sigma bonds are present in _______a) Propene b) Butanoic acidc) Butanal d) Ethoxy butane28. In alkyne, the hybridization is____________a) sp2 b) spc) sp d) All29. Octane no. of any fuel can be improved by______a) Pyrolysis b) Reformingc) Polymerization d) Condensation30. The fuel having 40% n-heptane & 60% iso-octane will have octane numbera) 40 b) 60c) 80 d) 9031. Which of them is heterocyclic organiccompound?a) Benzene b) Cresolc) Naphthalene d) Pyridine32. Which one is the mixture of 215 organiccompounds?a) Water gas b) Coal gasc) Coal tar d) Crude coal gas33. Octane number is the percentage ofa) n-pentane in a mixtureb) n-butane in a mixturec) n-hexane in a mixtured) 2, 2, 4 – trimethyl pentane in a mixture34. During the fractional distillation of petroleum,paraffin oil boils between the rangesa) 25oC b) 40 – 180oCc) 175 – 275oC d) 220 – 350oC35. The octane number of gasoline may increasedby addinga) EDTA b) NaOHc) AgNO3 d) PB(C2H5)436. Which process increases the yield of gasolinefrom petroleum?a) Cracking b) Polymerizationc) Reforming d) Sublimation37. Consider the reaction3C2H2 tubeCuC6H6This is the example ofa) Pyrolysis b) Polymerizationc) Sublimation d) Addition38. Which one is acyclic hydrocarbon?a) C6H6 b) C2H6c) C6H12 d) CH439. Which type of isomerism is shown by thefollowing compounds?CH3 – CH2 – CHO, CH3 – CO – CH3a) Chain isomerismb) Position isomerismc) Metamerismd) Functional group isomerism40. The type of isomerism found in 1 – butene and2 – butane isa) Position b) Chainc) Functional group d) Metamerism41. The members of which of these have similarmethods of preparation and properties
34a) Isomers b) Homologuesc) Polymers d) Monomers42. The maximum number of isomers for analkene with molecular formula C4H8 isa) 2 b) 3c) 4 d) 543. Which of the following is most stable ion?a) CH3 – H2C+ b) (CH3)2 HC+c) (CH3)3 C+ d) All of these44. Which of the following is not an organiccompound?a) Urea b) Oxalic acidc) Natural gas d) Plaster of Paris45. Kerosine oil is a mixture ofa) Alkane b) Alkenec) Alkynes d) All of these46. Which of the following compounds does notcontain an OH group?a) Alcohol b) Phenolc) Aldehyde d) Carboxylic acid47. The chemical formula of chloride isa) CH3OH b) CCl3OHc) CCl3CHO d) None of these48. Petroleum in the unrefined form is called ____a) Rock oil b) Coal gasc) Crude oil d) Both a & c49. Natural gas mainly consists of ________a) Methane b) Ethanec) Propane d) Butane50. _______ is a mixture of methane, ethane,propane and butane, used as a fuel and formaking other organic chemicals.a) Refinery gas b) Gasolinec) Kerosene oil d) Gas oil51. A large number of organic compounds,especially the unsaturated ones, show a greattendency to unit. This process is termed as______a) Pyrolysis b) Crackingc) Polymerization d) None of these52. An isomer of ethanol is ________a) Dimethyl ether b) Diethyl etherc) Ethylene glycol d) Methanol53. When ethylene is heated under pressure, atransparent solid polymer, ________ isobtained.a) Polyethene b) Ethanec) Methane d) None of these54. The quality of petroleum is determined by_______a) Decane number b) Octane numberc) Hexane number d) None of these55. Two or more than two different compoundshaving the same molecular formula butdifferent carbon chains or skeletons are saidto be ______a) Chain isomersb) Position isomersc) Functional group isomersd) Metamers56. The kind of isomerism which depends uponthe relative position of the functional group, orthe position of double or tripe bond in case ofunsaturated compounds is termed as________a) Chain isomerismb) Position isomerismc) Functional group isomerismd) Metamerism57. Isomerism, which involves compounds havingthe same molecular formula, but differentfunctional groups are called _______a) Chain isomerismb) Position isomerismc) Functional group isomerismd) Metamerism58. _______ is exhibited by compounds havingthe same functional group but different alkylattached to the same multivalent atom.a) Chain isomerismb) Position isomerismc) Functional group isomerismd) Metamerism
3559. In cracking usually catalyst used is _______a) Pt b) Aluuminosilicatec) Ni d) Tetra ethyl lead60. In CCl4 molecule the four valencies of carbonatom are directing towards the corners of a_______a) Cube b) Hexagonc) Prism d) Tetrahedron61. The general formula (RCO)2O represents________a) An ether b) Ketonec) An ester d) An acid hydride62. ______ has the longest bond length.a) C = C b) C ≡ Cc) C – C d) All of these63. Compounds in which two alkyl groups areattached to an oxygen atom are called ______a) Alkanes b) Ethersc) Alcohols d) Isomer64. ________ is the common name of methanol.a) Formaldehyde b) Acetaldehydec) Propionaldehyde d) None of these65. ______ is the common name of propanone.a) Acetone b) Ketonec) Diethyl ketone d) None to these66. The properties of organic compounds are dueto _______a) Covalent bonds b) Functional groupsc) Ionic bonds d) None of these67. ______ of the following are isomers.a) Methyl alcohol and dimethyl etherb) Ethyl alchohol and dimethyl etherc) Acetone and Acetaldehyded) Proponoic acid and propanone68. Which compound contains an sp hybridized Catom?a) CH3CN b) CH3CHOc) CH3NH2 d) None69. Which of the following isomeric substanceswould be expected to have the lowest boilingpoint?a) Hexane b) 2 – methlypentanec) 2, 2 – dimethylbutaned) 3 – methlypentane70. The isomers must have the same ______a) Structural formula b) Molecular formulac) Chemical formula d) Physical propertiesChapter # 8Aliphatic Hydrocarbons1. Valencies in alkanes are _____________a. Completely satisfiedb. Partially satisfiedc. No satisfiedd. No general rules2. Alkanes containing one branch on mainchain are called_________a) Iso b) Normalc) Neo d) Branched3. When one hydrogen atom of alkane isreplaced/removed, then it is called_________a. Alkeneb. Alkylc. Aldehyded. Saturated hydrocarbon4. Alkanes are also known as _______
36a. Saturated hydrocarbonb. Unsaturated hydrocarbonc. Paraffinsd. a & c5. Sabatier’s Sendren’s reaction involves_________in presence of Nia) alkene & H2 b) alkene & O2c) alkene & N2 d) alkene & Cl26. Zn is a good___________a) Metal b) Oxidizing agentc) Non-metal d) Reducing agent7. Removal of -COOH is called______a) Carboxylation b) Decarboxylationc) Esterification d) Hydroxylation8. Soda lime is a mixture of_____________a. CaO and KOHb. CaO and NaOHc. NaOH and NaOd. Nao and KOH9. Malozonide changes into___________a) Epoxide b) CO2 + H2Oc) Ozonide d) CO+H2O10. RCOONa+H2O [Electrolysis] is known as_____a) Bosch reaction b) Kolb reactionc) Sabatier’s reactiuon d) Frankland reaction11. R-Mg-Br is called_________a. Grignard reagentb. Wurtz reactionc. Tollen’s reagentd. Pinacol pinacolour reagent12. Upto _____ C atoms, alkanes are gasesa) 2 b) 3c) 4 d) 613. Alkanes are less reactive than alkenesdue to__________a. Presence of sigma bondb. Absence of pi bondsc. Presence of sigma and pi bondsd. No justification available14. Introduction of nitro group is called______a) Nitration b) Halogenationc) Sulphonation d) None15. Order of halogenation is___________a) I>Cl>Br>F b) F>Cl>I>Brc) F>Cl>Br>I d) Cl>F>Br>I16. Gas is used in fertilizer ____________a) C2H6 b) C2H4c) C2H2 d) CH417. General formula of alkenes is _______a) CnH2n+2 b) CnH2n-2c) CnH2n d) CnH2n-x18. The order of dehydration of alcohol is____a. sec>pri>terb. pri>sec>terc. ter>sec>prid. no specificity occurs19. Removal of halogen and hydrogen atomis___a. Halogenationb. Dehalogenationc. Dehydrohalogenationd. Carbonations20. Alkenes are produced fromDehalogenation of_______a) di-halides alkane b) tri-halides alkanec) vic. Di-halide d) vic. Trihalides21. Reactivity due to pi- electrons is present in____________a) Alkane b) Alkenec) Alkyne d) b and c22. π- electrons favour____________a. Less reactivityb. Addition reactionsc. Substitution reactionsd. None23. Raney nickel is____________a. An alloy of Ni-Cub. Alloy of Ni-Fec. Alloy of Ni-Ald. Alloy of Ni-Mg
3724. Which member of IV A has little tendency toform anions or cations?a) Pb b) Snc) Ge d) C25. Alkanes due to little chemical reactivity arealso calleda) Olefins b) Paraffinsc) Grignard’s reagent d) None of these26. Methane and other members of paraffins donot react with aqueous solution of acids,alkalies, KMnO4 or other oxidizing agents thislack of reactivity is due to its naturea) Polar b) Nonpolarc) Acidic d) Basic27. Which hybrid orbital will form the compoundCH3 – CH = CH – CH2 – CH3a) SP2 and SP b) SP2 and SP3c) SP d) SP328. Which of the following types of reactions occurwhen a reactant has a double bond?a) Substitution b) Additionc) Photolysis d) Polymerization29. Among the following orbital bonds, the angle isminimum betweena) SP3 bond b) Px and Py orbitalsc) H – O – H in water d) SP bond30. The compound with highest boiling point isa) n – hexaneb) n – pentanec) 2 – methyl butaned) 2, 2 – dimethyl propane31. Alcoholic KOH solution is used fora) Dehydrogenationb) Dehalogenationc) Dehydrohalogenationd) Dehydration32. Which is least soluble in water?a) Phenol b) Benzenec) Benzoic acid d) Ethanol33. Baeyer’s test is use to detect the bond in anorganic compounda) Single bond b) Double bondc) Triple bond d) All of these34. Ethylene reacts with Baeyer’s reagent to forma) CO2 and H2O b) Ethyl alcoholc) Ethylene oxide d) Ethylene glycol35. When ethylene reacts with chlorine to form anoily product. This oily product is calleda) Baeyer’s test b) Bromine waterc) Dutch – liquid d) Glycol36. Which of them is used as general anesthetic?a) Ethane b) Ethenec) Ethyne d) Ether37. The positive part of the adding molecule willgo to that carbon which has greater number ofhydrogen atoms. This statement is calleda) Hoffmann’s Ruleb) Baeyer’s Strain theoryc) Thiele’s theoryd) Markownikoff’s rule38. Bromo Ethane on treatment with alcoholicKOH yieldsa) Propane b) Ethenec) Ethylene d) Acetylene39. Metallic carbide on treatment with water givesout a colourless gas which burns readily in airand gives a red precipitate with Cu2Cl2 +NH4OH. The gas isa) CH4 b) C2H6c) C2H4 d) C2H240. When acetylene reacts with 10% H2SO4 in thepresence of HgSO4 yieldsa) CH3OH b) CH3COOHc) CH3CHO d) CH3OCH341. Dehydration of Ethanol givesa) C2H4 b) C2H2c) C2H6 d) C2H4O42. Which of the following has active hydrogen?a) C2H2 b) C2H4c) C2H6 d) CH443. Treatment of propene with cold concentratedH2SO4 followed by boiling water formsa) Propyne b) Propanolc) Propanal d) 2 – Propanol44. Markownikoff’s rule provides guidance foraddition of HBr in
38a) CH2 = CH – CH3b) CH2 = CH2c) CH3 – CH = CH – CH3d) None of these45. The compound having both SP and SP3hybridized carbon atom isa) Propene b) Propanec) Propyne d) All of these46. PVC is a polymer ofa) CH2 = CH2 b) C2H6c) CH2 = CH Cl d) C2H247. The structural formula of the compound whichyields ethylene upon reaction with Zinc isa) CH2Br – CH2Br b) C2H3Brc) C2H2 d) C2H5OH48. The major reactions occur in alkanes area) Electrophilic addition reactionb) Nucleophilic substitution reactionc) Free radical substitution reactiond) Free radical addition reaction49. Consider a reactionCH3 – CH = CH2 + H – X → productThe reaction occurs by obeyinga) Wurtz’s ruleb) Frankland’s rulec) Markownikoff’s ruled) Kekule’s rule50. Acetylene is used as a starting material for thepreparation of Plastics, Synthetic rubber andSynthetic fibre calleda) Orlon b) Narlonc) Corlon d) Forlon51. The high polymer of chloroprene isa) Polythene b) Benzenec) Neoprene d) Vinyl acetylene52. Which one of the following gives Ethyne onelectrolysis?a) Sodium Acetate b) Sodium Succinatec) Sodium Formate d) Sodium Fumerate53. Ethene on interaction with hypochlorous acidgivesa) Dichloro acetaldehydeb) Dichlorohydrinc) Ethylene chlorohydrind) Ethylene Dichlorohydrin54. The compounds having Pi bonds are ingenerala) More reactive b) Less reactivec) Neutral d) Both a & b55. Which one will not decolourize bromine water?a) Ethene b) Ethynec) Propene d) Butane56. Acetylene adds on to HCN to givea) Acetylene cyanideb) Cyanoacetylenec) Vinyl ethaned) Acrylonitrile57. Action of HOCl with ethene to give ethylenechlorohydrin is an example ofa) Displacement reactionb) Substitution reactionc) Addition reactiond) Polymerization reaction58. Chloroform is stored in dark coloured bottlesbecause in light it isa) Reduced to CCl4b) Oxidized to CCl4c) Reduced to phosgened) Oxidized to a poisonous phosgene59. Formation of alkane by the action of zinc onalkyl halide is called ________a) Frankland reactionb) Wurtz reactionc) Cannizzaro’s reactiond) Kobe’s reaction60. The alkynes have _______a) Tetrahedral frame workb) Planar moleculesc) Linear structured) None of these61. The alkenes have _______a) Tetrahedral frame workb) Planar moleculec) Linear structured) None of these62. Alkenes undergo _______
39a) Addition reactionb) Substitution reactionc) Both addition & substitution reactiond) None of these63. _______ does not react with aqueous solutionof acids, alkalies, or potassium permanganateor other oxidizing agents and most of the usuallaboratory reagents.a) Benzene b) Etherc) Methane d) Acetic acid64. The IUPAC name for the following compoundisCH3 CH2CH2CH3│ │CH3 – CH – CH – CH – CH = CH2│CH3a) 4, 5 – dimethyl – 3 – propyl – 2 – hexeneb) 4, 5 – dimethyl – 3 – propyl – 1 – hexenec) 3– propyl – 3 – dimethylpropyl – 1 – hexaned) 2, 3 – dimethyl – 4 – propyl – 5 – hexane65. Markovnikov addition of KCl to propeneinvolves,a) Initial attack by a chloride ionb) Isomerization of 1 – chloropropanec) Formation of n – propyl cationd) Formation of isopropyl cation66. When an aqueous solution of sodium orpotassium salt of mono carboxylic acid issubjected to electrolytic, corresponding alkaneis formed. This reaction is called ________a) Sabatier Senderens Reactionb) Kolbe’s Electrolysisc) Polymerizationd) Chlroination67. The elimination of hydrogen halide (HX) fromadjacent carbon atoms is called ________a) Pyrolysis b) Chlorinationc) Dehydrohalogenation d) None68. When a mixture of ethane and air is passedover heated silver under pressure, we get_____a) Epoxide b) Super oxidec) Suboxide d) None69. The process used for the preparation ofacetylene is _______a) Berthelot Processb) Sabatier – Senderns Reactionc) Kolbe’s Processd) Haber’s process70. A simple chemical test to distinguish 1, 3-butadiene and 1- butyne isa) Br2│CCl4 b) Ag(NH3)2OHc) KMnO4 d) NoneChapter # 9Aromatic Hydrocarbons1. The molecular formula of toluene is_______a) C7H7 b) C7H8c) C8H8 d) C8H72. In benzene sulphonic acid, the sulphonicgroup is attached with benzene ringthrough_____a) Hydrogen b) Oxygenc) Sulpher d) –OH3. Phenanthrene ________ benzene ringsa) Two b) Threec) Four d) Five4. Aniline is a derivative of benzene whichcontains______
40a) Hydroxyl group b) Amino groupc) Amido group d) Imido group5. How many π electrons are there in benzene?a) 3 b) 4c) 6 d) 86. The molecular formula of biphenyl methaneis____________a) C12H10 b) C12H12c) C13H10 d) C13H127. When two or more different substituents areattached with a benzene ring, the number 1position in the ring is given to a high prioritygroup. Which one of the following groups hashighest priority?a) –NH2 b) –CHOc) –COOH d) –CN8. When benzene is substituted by halogensonly, which one of the following halogens isgiven the number one position in the ring whilewriting the name of compound?a) Bromine b) Chlorinec) Flourine d) Iodine9. Which one of the following is not a metadirecting group?a) –CN b) –OHc) –COOH d) –CHO10. Which pair of groups contains both ortho ¶ directors?a. –OH, –RCOb. –NR3, –CNc. –OCH3, –CHOd. –N (CH3)2, –NH211. Michael Faraday discovered benzene in thegas which was produced by destructivedistillation of vegetable oil done in_________a. The presence of Oxygenb. The presence of Hydrogenc. The absence of Oxygend. The presence of excessive Oxygen12. How many moles of H2 are added up whenbenzene is heated with hydrogen in thepresence of platinum?a) Two b) Threec) Four d) Six13. In benzene the C-C bond length is larger thanthe C-H bond length by a numerical valueof____________a) 0.307Ao b) 0.307 nmc) 0.337Ao d) 0.307 nm14. The heat of hydrogenation of cyclohexene is_____________a. -219.5 KJ/ moleb. 219.5 calories/ molec. -119 KJ/ moled. -119 Cal/ mole15. The resonance energy of benzene is______a. 150.5 KJ/ moleb. 250.5 KJ/ molec. 150.5 KJ/ moled. 250.5 KJ/ mole16. The resonance between different structures isrepresented by______a.b.c.d. ~17. What catalyst is employed when benzene isprepared from acetylene at 70˚C?a. Zn amalgamb. AlCl3c. Organo-nickeld. Rancy Rickel18. Mixture of catalysts Cr2O3 + Al2O3 + SiO2 at500˚C are used when benzene is preparedfrom____________a. Cycloalkeneb. n-hexanec. Benzene sulphonic acidd. Sodium benzoate19. Which one of the following methods will notgive benzene?a. Heating so. Salt of Benzoic acid withsoda limeb. Distillation phenol with Zn dustc. Chlorobenzene with NaOH at 360˚C & 300atm.d. Hydrolysis of benzene sulphonic acidwith super heated steam.
4120. What is the ratio of conc. HNO3 & conc.H2SO4 when nitration of benzene is done at50˚C?a) 1:1 b) 2:1c) 1:2 d) 2:321. In Friedel Craft Alkylation, AlCl3 is used togenerate___________a. Strong nucleophileb. Weak nucleophilec. Strong electrophited. Weak electrophite22. Acylation of benzene is the introduction of___________on benzene.O||a. R ─ C ─ O ─O||b. Cl ─ C ─O||c. R ─ C ─O||d. H ─ C ─23. Acetophenone is a ______________a) Quinone b) Ketonec) Aldehyde d) Other24. Reacting bromine with benzene in thepresence of sunlight will result in__________a. The rupturing of Benzene mgb. Substitution reactionc. Addition reactiond. No-reaction25. Benzene does not undergo ___________a. Substitution reactionb. Addition reactionc. Polymerization reactionsd. Oxidation reactions26. During sulphonation of benzene, H2SO4generates____________ electrophilea) HSO4-b) SO2c) NO2-d) NO2+27. Nitronium ion is_____________a) NO3 b) NOc) NO2-d) NO2+28. Which compound will readily undergosulphonation?a) Benzene b) Nitro benzenec) Golvene d) Chlorobenzene29. Benzene is heated in air with V2O5 at 450˚C itundergo ___________a. Substitution reactionb. Addition reactionc. Elimination reactiond. Oxidation reaction30. Which one of the following statement is notcorrect about benzene?a. On hydrogenation, 208 KJ/ mole isliberatedb. C-H bond length in benzene is 1.09Aoc. Molecular mass of benzene is 78.108d. Resonance energy of benzene is150.5 K Cal / mole31. The preparation of benzene from acethylenecan also be said as ________a) Oxidation b) Polymerizationc) Dehydration d) Condensation32. What is required other then anhydrous AlCl3,when toluene is prepared from Friedel craftreaction?a) C6H6 b) C6H6 + CH3Clc) C6H5C2H5 d) C6H5 ─ CH2─33. Replacement of hydrogen of benzene by alkylgroup in pressure of alkyl halide & ferricchloride is known as____________a. Dow’s processb. Friedel & Craft acylationc. Friedel & Craft alkylationd. Clemenson reaction34. Which of the following radical is called benzylradical?a) C6H5─ b) C6H5─CH=CH2c) C6H5─CH─ d) C6H5─CH2─35. Which compound form benzoic acid onoxidation with strong oxidizing agent?a) Toluene b) Ethyle benzenec) n-propyl bezene d) all36. Toluene can be converted to benzoic acid inpresence of _________a. Dil NaO4b. Mixture of HNO3 & H2SO4c. Zn dust
42d. Acidified KMnO437. Which one of the following is benzal chloride?a. C6H5 CH2Clb. C6H5 CHCl2c. C6H5─CH = CHCld. None of the above38. What is the molecular formula ofBenzenetriozonide?a) C6H6O9 b) C6H5O8c) C6H5O9 d) C6H6O639. The hydrolysis of Benzenetriozonide will yieldthree moles of ________a) Glyoxine b) Benzaldehydec) Glycol d) Glyoxal40. Which of the following will undergo nitrationmore easily and readily?a) C6H6 b) C6H5CHCl2c) C6H5CCl3 d) C6H5CH341. The reaction of toluene with chlorine in thepresence of FeCl3 givesa) Benzyl chlorideb) Benzal chloridec) m – Chloro Toluened) O/P Chloro Toluene42. Benzene is made ofa) 6 Pi and 6 sigma bondsb) 3 Pi and 3 sigma bondsc) 3 Pi and 12 sigma bondsd) 6 Pi and 3 sigma bonds43. Common reaction of Benzene and itsderivatives area) Electrophilic additionb) Electrophilic substitutionc) Nucleophilic additiond) Nucleophilic substitution44. Benzene when treated with acetyl chloride inthe presence of AlCl3 yieldsa) Acetyl Benzene b) Benzyl Chloridec) Benzophenone d) Acetophenone45. Passing vapors of Phenol over heated Zincgivesa) Benzene b) Acetic Acidc) Benzoic Acid d) Benzaldehyde46. Which of the following is not an explosive?a) Picric Acid b) Trinitrobenzenec) Trinitro Toluene d) Nitro benzene47. Toluene on reaction with acidic KMnO4producesa) Phenol b) Benzoic acidc) Benzyl alcohol d) Benzophenone48. The b.p of P – nitro phenol is higher than thatof O – nitro phenol becausea) Nitro group is O/P groupb) Nitro group is electron donating groupc) Bonding occurs in P – nitro phenold) None of these49. Which of the following can be easily nitrated?a) Phenol b) Benzoic acidc) Nitro benzene d) All of these50. Aspirin is obtained by reaction of sulphuricacid anda) Phenol b) Benzenec) Acetyl chloride d) None of these51. Sulphonation of benzoic acid givesa) O – benzene sulphonic acidb) P – benzene sulphonic acidc) m – benzene sulphonic acidd) O/P benzene sulphonic acid52. Benzene can be obtained bya) Reaction of zinc and phenolb) Hydrolysis of benzene sulphonic acidc) Reduction of benzene chlorided) All of these53. o – xylene on oxidation yieldsa) Oxalic acid b) o – Phthalic acidc) Toluene d) m – Phthalic acid54. The resonance energy of benzene isa) 36 j/mol b) 36 cal/molc) 36 Kcal/mol d) none of these55. The catalyst used for halogenation of benzeneisa) Cu b) Nic) FeCl3 d) Zn56. Which one is nitronium ion?