UPSEE–PAST PAPERSCHEMISTRY- UNSOLVED PAPER - 1998
SECTION – I   Single Correct Answer Type         There are five parts in this question. Four choices are given for each ...
01   Problem     Which one of the following does not have any unit ?     a. Electron affinity     b. Ionisation energy    ...
02   Problem     The oxidation number of O in H2O2 is :     a. - 2     b. - 1     c. + 1     d. + 2
03   Problem     The product CH3 – CH = CH2 + HBr X is :     CH3 – CH2 – CH2Br     CH3 – CHBr – CH3     CH2Br – CH = CH2  ...
04   Problem     German silver is a alloy of copper and :     a. Zn and Ni     b. Al     c. Zn     d. Sn
05   Problem     The formula of haematite is :     a. Fe3O4     b. Fe2O3     c. FeCO3     d. FeS2
06   Problem     Which one of the following is a Lewis acid ?     a. PCl3     b. AlCl3     c. NCl3     d. AsCl3
07   Problem     Copper sulphate solution reacts with KCN to give :     a. Cu(CN)2     b. CuCN     c. K4[Cu(CN)4]     d. K...
08   Problem     Finely divided iron combine with Co to give :     a. Fe(CO)5     b. Fe(CO)3     c. Fe(CO)18     d. Fe(CO)6
09   Problem     The molecule with pyramidal shape is :     a. PCl3     b. SO3     c. CO32-     d. NO3-
10   Problem     Bakelite is obtained from phenol by reacting with :     a. Acetaldehyde     b. Acetal     c. Formaldehyde...
11   Problem     The aldol condensation acetaldehyde results in the :
12   Problem     Benzyl alcohol is obtained from benzaldehyde by :     a. Wurtz reaction     b. Cannizaro reaction     c. ...
13   Problem     Which of the following compounds can exist in optically active form ?     a. 1-butanol     b. 2-butanol  ...
14   Problem     The oxidation number of Pt in [Pt(C2H4)Cl3]- is     a. +1     b. +2     c. +3     d. +4
15   Problem     The IUPAC name of     a. 1, 1 – dimethyl-1, 3-butanediol     b. 4-methyl-2, 4-pentanediol     c. 2-methyl...
16   Problem     How many isomers are possible for pentane ?     a. 4     b. 5     c. 6     d. 3
17   Problem     The number of particles emitted in the nuclear reaction,            228→       212     90Th          83Bi...
18   Problem     The pH of a 10-10 M NaOH solution is nearest to :     a. 10     b. 7     c. 4     d. - 10
19   Problem     Which of the following compound is not sp3 hybridised ?     a. NH3     b. SO3-2     c. C(C6H5)3-     d. SF4
20   Problem     The molecule which does not exhibit dipole moment is ;     a. NH3     b. CHCl3     c. H2O     d. CCl4
21   Problem        238     92U      emits -particle, the product has mass number and atomic number :     a. 236, 92     b...
22   Problem     What is the half-life of 6C14, if its disintegration constant is 2.31 x 10-4 yr-1 ?     a. 0.3 x 104 yr  ...
23   Problem     Gamma rays are :     a. High energy electrons     b. Low energy electrons     c. High energy electromagne...
24   Problem     The compound which contain both ionic and covalent bond, is :     a. CH4     b. H2     c. KCN     d. KCl
25   Problem     The pH of a 10-8 M solution of HCl in water is :     a. 8     b. -8     c. between 7 and 8     d. between...
26   Problem     Which one of the following contains a co-ordinate bond ?     a. BaCl2     b. CsCl     c. H2O     d. N2H5 +
27   Problem     The C – H bond distance is the largest in :     a. C2H2     b. C2H4     c. C2H4Br2     d. C6H6
28   Problem     The oxidation number of carbon in CH2O is :     a. - 2     b. + 2     c. zero     d. + 4
29   Problem     A p-orbital can accommodate :     a. 4 electrons     b. 6 electrons     c. 2 electrons with parallel atom...
30   Problem     Heavy water is used in atomic reactor as :     a. Coolant     b. Moderator     c. Both coolant and modera...
31   Problem     Aniline is separated from a mixture by :     a. Fractional crystallization     b. Fractional distillation...
32   Problem     The oxidation number of oxygen in potassium super oxide KO2 is :     a. - 2     b. - 1     c. - 1/2     d...
33   Problem     The element californium belongs to the family of :     a. Actinide series     b. Alkali metal family     ...
34   Problem     A compound contains two dissimilar asymmetric carbon atoms. The number of     optical isomers is :     a....
35   Problem     The number of unpaired electrons in carbon atom is :     a. 1     b. 2     c. 3     d. 4
36   Problem     The maximum extent of H-bonding is shown by :     a. H2O     b. HF     c. H2S     d. H2Se
37   Problem     The catalyst used in hydrogenation of oil is :     a. V2O5     b. Fe     c. Ni     d. Pt
38   Problem     The IUPAC name of CH3OC2H5 is :     a. 1-ethoxy methane     b. 1-methoxy ethane     c. methyl ethyl ether...
39   Problem     Chloroform can be obtained from :     a. Methanol     b. Methanal     c. Propanol-1     d. Propanol-2
40   Problem     Alkaline hydrolysis of ester is called :     a. Neutralisation     b. Esterification     c. Polymerizatio...
41   Problem     Cinnabar is the ore of :     a. Mercury     b. Copper     c. Zinc     d. Lead
42   Problem     The magnetic quantum number is related to :     a. Size     b. Shape     c. Orientation     d. Spin
43   Problem     Mohr’s, slat is :     a. Normal salt     b. Acid salt     c. Basic salt     d. Double salt
44   Problem     Which of the following metal carbonates is decomposed on heating ?     a. MgCO3     b. Na2CO3     c. K2CO...
45   Problem     Which one of the following has the smallest radius ?     a. O2-     b. F-     c. Li+     d. Be2+
46   Problem     Brass in an alloy containing :     a. Zn + Cu     b. Cu + Sn     c. Zn + Sn     d. Cu + Zn + Sn
47   Problem     Red lead is :     a. PbO     b. Pb2O     c. Pb2O3     d. Pb3O4
48   Problem     Calcium acetate on dry distillation give :     a. Acetic anhydride     b. Acetone     c. Acetaldehyde    ...
49   Problem     In Ni(CO)4 the oxidation state of Ni is :     a. 0     b. 4     c. 8     d. 2
50   Problem     For the reaction 2NH3(g)    N2(g) + 3H2(g), the unit of Kp will be :     a. [atm]     b. [atm]3     c. [...
51   Problem     Which one of the following is not a colligative property ?     a. Tf     b. π     c. Tb     d.kb
52   Problem     The equilibrium constant for the reaction SO2(g) + 1/2O2(g)    SO3(g) and     2SO3(g)  2SO2 (g) + O2(g)...
53   Problem     Iodine is formed when KI reacts with a solution of :     a. ZnSO4     b. CuSO4     c. FeSO4     d. (NH4)2...
54   Problem     The metal oxide which decomposes on heating is :     a. ZnO     b. Al2O3     c. CuO     d. HgO
55   Problem     Which one is not an ore of aluminium ?     a. Anhydrite     b. Bauxite     c. Corundum     d. Cryolite
56   Problem     Calculate the solubility of AgCl in mol/L if the solubility product constant for AgCl     is 1 x 10-10 : ...
57   Problem     The standard reduction potentials for Fe2+ | Fe and Sn2+ | Sn electrode are - 0.44     V and - 0.14 V res...
58   Problem     The effect of catalyst in a chemical reaction is to change :     a. Heat of reaction     b. Activation en...
59   Problem     Which one of the following sterilizes the water ?     a. CO2     b. O2     c. O3     d. SO3
60   Problem     The oxidation state of Mo in Mo2Cl84- is :     a. + 4     b. - 4     c. + 1     d. + 2
61   Problem     Which one is the correct name of the compound ?     a. 3-isopropyl-2-methyl pentane     b. 3-ethyl-2,4-di...
62   Problem     The product of the following reaction is :
63   Problem     The number of possible enantiomeric pairs that can be produced during mono     chlorination of 2-methyl b...
64   Problem     Lewisite is :          CHCl     a. ||        CHAsCl3        CHCl     b. ||        CHAsCl4          CHCl  ...
65   Problem     Which of the following reactions will yield 2, 2-dibromopropane ?     a. HC    CH + 2HBr→     b. CH3 – C ...
66   Problem     Adding Cl2 in benzene in the presence of Fe is an example of :     a. Addition     b. Halogenation     c....
67   Problem     The major product of nitration of benzoic acid is :     a. 3-nitrobenzoci acid     b. 2, 4-nitro benzoic ...
68   Problem     What is obtained when toluene reacts with chlorine in the presence of light ?     a. Benzyl chloride     ...
69   Problem     SN1 reaction of favoured by :     a. Crowding at the alpha C-atom     b. Non-polar solvents     c. Small ...
70   Problem     A compound is soluble in conc. H2SO4. It does not decolouries bromine in CCl4     but is oxidized by chro...
71   Problem                                                NaOH        CO2         HCl                                   ...
72   Problem     Propionic acid is subjected to reduction with HI in the presence of little P, the     product formed is :...
73   Problem     Butyne-2 contains :     a. sp-hybridised carbon atoms only     b. sp3- hybridized carbon atoms only     c...
74   Problem     The empirical formula of a compound is CH2. One mole of this compound has a     mass of 42 g. Its molecul...
75   Problem     The number of isomers of C6H14 is :     a. 4     b. 6     c. 5     d. 7
Part II
76   Problem     How will you convert ?     a. Ethyl alocohol to vinyl acetate     b. Tolune to p-nitrobenzyl ethyl ether
77   Problem     The vapour density [Hydrogen = 1] of a mixture containing NO2 and N2O4 is 38.3     at 270C. Calculate the...
78   Problem     Give reasons for the following :     a. PF5 is known but NF5 is not .     b. Formic acid is a stronger ac...
79   Problem     How will you bring about the following transformations ?
80   Problem     Calculate the simultaneous solubility of AgSCN and AgBr. Ksp for AgSCN and AgBr     are 1.0 x 10-12 and 1...
81   Problem     Arrange the following as indicated :     a. n-butane, ethanol, water propane in order of increasing boili...
82   Problem     a. What do you understand by electrovalency ? Describe the characteristics of        electrovalent compou...
83   Problem     a. Why is there no 2d or 3f orbital ?     b. Deduce the possible sets of four quantum numbers when n = 2
84   Problem     How will you convert ?     a. Methanal to ethanal     b. Acetic acid to acetone     c. Acetaldehyde to et...
85   Problem     How many moles of each of the following will be present in 20 g ?     a. C6H12O6     b. CH3OH     c. CH3C...
86   Problem     The molal elevation constant for water is 0.560 per kg of water. Calculate the     boiling point of solut...
87   Problem     Calculate the normality of resulting solution made by adding 2 drops (0.1 mL) of     0.1 N H2SO4 in 0.1 L...
88   Problem     Compute the solubility of AgCl in mol/L, if the solubility product constant for AgCl     is 1 x 10-10
89   Problem     Match the following :     1. Arrhenius            a . NH4+     2. Ostwald              b. NH4OH + NH4Cl  ...
90   Problem     What happens when :     a. Acetylene is passed through an aqueous solution containing H+ and Hg2+ ions.  ...
91   Problem     Fill in the blanks :     a. Pure chloroform is obtained by heating ……… with aqueous solution of NaOH.    ...
92   Problem     Write down five reactions, when hydrogen peroxide is used as reducing agent.
93   Problem     Complete and balance the following equation :     a. HCl + MnO2 H2O + MnCl2 + …..     b. H2SO4 + HI …… + ...
94   Problem     Name one method used for the manufacture of :     a. Nitric acid     b. Sulphuric acid     c. Soda ash   ...
95   Problem     Calculate the weight of methane in a 9.0 L cylinder at 16 atm and 270C. R = 0.08 L     atm K-1 mol-1]
96   Problem     Give IUPAC name for the following :     (a) t-butyl alcohol
97   Problem     Write the Lewis structure of the following by indicating bonded electron pair with     dash ( -) and non-...
98   Problem     Complete and balance the following equations :     a. Cu2+ I- Cu+ + I2     b. Fe2+ + MnO4- Fe2+ + Mn2+
99   Problem     State whether true or false, give one or two sentences in reasoning.     a. The rate of diffusion of a ga...
100   Problem      Give one example of each of the following :      a. Perkin reaction      b. Aldol condensation      c. ...
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UPSEE - Chemistry -1998 Unsolved Paper

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UPSEE - Chemistry -1998 Unsolved Paper

  1. 1. UPSEE–PAST PAPERSCHEMISTRY- UNSOLVED PAPER - 1998
  2. 2. SECTION – I Single Correct Answer Type  There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate
  3. 3. 01 Problem Which one of the following does not have any unit ? a. Electron affinity b. Ionisation energy c. Electronegativity d. None of the above
  4. 4. 02 Problem The oxidation number of O in H2O2 is : a. - 2 b. - 1 c. + 1 d. + 2
  5. 5. 03 Problem The product CH3 – CH = CH2 + HBr X is : CH3 – CH2 – CH2Br CH3 – CHBr – CH3 CH2Br – CH = CH2 CH2 = C = CH2
  6. 6. 04 Problem German silver is a alloy of copper and : a. Zn and Ni b. Al c. Zn d. Sn
  7. 7. 05 Problem The formula of haematite is : a. Fe3O4 b. Fe2O3 c. FeCO3 d. FeS2
  8. 8. 06 Problem Which one of the following is a Lewis acid ? a. PCl3 b. AlCl3 c. NCl3 d. AsCl3
  9. 9. 07 Problem Copper sulphate solution reacts with KCN to give : a. Cu(CN)2 b. CuCN c. K4[Cu(CN)4] d. K3[Cu(CN)4]
  10. 10. 08 Problem Finely divided iron combine with Co to give : a. Fe(CO)5 b. Fe(CO)3 c. Fe(CO)18 d. Fe(CO)6
  11. 11. 09 Problem The molecule with pyramidal shape is : a. PCl3 b. SO3 c. CO32- d. NO3-
  12. 12. 10 Problem Bakelite is obtained from phenol by reacting with : a. Acetaldehyde b. Acetal c. Formaldehyde d. Chlorobenzene
  13. 13. 11 Problem The aldol condensation acetaldehyde results in the :
  14. 14. 12 Problem Benzyl alcohol is obtained from benzaldehyde by : a. Wurtz reaction b. Cannizaro reaction c. Claisen reaction d. Perkin reaction
  15. 15. 13 Problem Which of the following compounds can exist in optically active form ? a. 1-butanol b. 2-butanol c. 3-pentanol d. 4-heptanol
  16. 16. 14 Problem The oxidation number of Pt in [Pt(C2H4)Cl3]- is a. +1 b. +2 c. +3 d. +4
  17. 17. 15 Problem The IUPAC name of a. 1, 1 – dimethyl-1, 3-butanediol b. 4-methyl-2, 4-pentanediol c. 2-methyl-2, 4-pentanediol d. 1, 3, 3-trimethyl-1, 3-propendiol
  18. 18. 16 Problem How many isomers are possible for pentane ? a. 4 b. 5 c. 6 d. 3
  19. 19. 17 Problem The number of particles emitted in the nuclear reaction, 228→ 212 90Th 83Bi a. 4 α and 1 β b. 3 α and 7 β c. 8 αand 1 β d. 4 α and 7 β
  20. 20. 18 Problem The pH of a 10-10 M NaOH solution is nearest to : a. 10 b. 7 c. 4 d. - 10
  21. 21. 19 Problem Which of the following compound is not sp3 hybridised ? a. NH3 b. SO3-2 c. C(C6H5)3- d. SF4
  22. 22. 20 Problem The molecule which does not exhibit dipole moment is ; a. NH3 b. CHCl3 c. H2O d. CCl4
  23. 23. 21 Problem 238 92U emits -particle, the product has mass number and atomic number : a. 236, 92 b. 234, 90 c. 238, 92 d. 236, 90
  24. 24. 22 Problem What is the half-life of 6C14, if its disintegration constant is 2.31 x 10-4 yr-1 ? a. 0.3 x 104 yr b. 0.3 x 103 yr c. 0.3 x 108 yr d. 0.3 x 102 yr
  25. 25. 23 Problem Gamma rays are : a. High energy electrons b. Low energy electrons c. High energy electromagnetic waves d. High energy positrons
  26. 26. 24 Problem The compound which contain both ionic and covalent bond, is : a. CH4 b. H2 c. KCN d. KCl
  27. 27. 25 Problem The pH of a 10-8 M solution of HCl in water is : a. 8 b. -8 c. between 7 and 8 d. between 6 and 7
  28. 28. 26 Problem Which one of the following contains a co-ordinate bond ? a. BaCl2 b. CsCl c. H2O d. N2H5 +
  29. 29. 27 Problem The C – H bond distance is the largest in : a. C2H2 b. C2H4 c. C2H4Br2 d. C6H6
  30. 30. 28 Problem The oxidation number of carbon in CH2O is : a. - 2 b. + 2 c. zero d. + 4
  31. 31. 29 Problem A p-orbital can accommodate : a. 4 electrons b. 6 electrons c. 2 electrons with parallel atoms d. 2 electrons with opposite spins
  32. 32. 30 Problem Heavy water is used in atomic reactor as : a. Coolant b. Moderator c. Both coolant and moderator d. Neither coolant nor moderator
  33. 33. 31 Problem Aniline is separated from a mixture by : a. Fractional crystallization b. Fractional distillation c. Vacuum distillation d. Steam distillation
  34. 34. 32 Problem The oxidation number of oxygen in potassium super oxide KO2 is : a. - 2 b. - 1 c. - 1/2 d. - 1/4
  35. 35. 33 Problem The element californium belongs to the family of : a. Actinide series b. Alkali metal family c. Alkaline earth family d. Lanthanide series
  36. 36. 34 Problem A compound contains two dissimilar asymmetric carbon atoms. The number of optical isomers is : a. 2 b. 3 c. 5 d. 4
  37. 37. 35 Problem The number of unpaired electrons in carbon atom is : a. 1 b. 2 c. 3 d. 4
  38. 38. 36 Problem The maximum extent of H-bonding is shown by : a. H2O b. HF c. H2S d. H2Se
  39. 39. 37 Problem The catalyst used in hydrogenation of oil is : a. V2O5 b. Fe c. Ni d. Pt
  40. 40. 38 Problem The IUPAC name of CH3OC2H5 is : a. 1-ethoxy methane b. 1-methoxy ethane c. methyl ethyl ether d. ethyl methyl ether
  41. 41. 39 Problem Chloroform can be obtained from : a. Methanol b. Methanal c. Propanol-1 d. Propanol-2
  42. 42. 40 Problem Alkaline hydrolysis of ester is called : a. Neutralisation b. Esterification c. Polymerization d. Saponification
  43. 43. 41 Problem Cinnabar is the ore of : a. Mercury b. Copper c. Zinc d. Lead
  44. 44. 42 Problem The magnetic quantum number is related to : a. Size b. Shape c. Orientation d. Spin
  45. 45. 43 Problem Mohr’s, slat is : a. Normal salt b. Acid salt c. Basic salt d. Double salt
  46. 46. 44 Problem Which of the following metal carbonates is decomposed on heating ? a. MgCO3 b. Na2CO3 c. K2CO3 d. Rb2CO3
  47. 47. 45 Problem Which one of the following has the smallest radius ? a. O2- b. F- c. Li+ d. Be2+
  48. 48. 46 Problem Brass in an alloy containing : a. Zn + Cu b. Cu + Sn c. Zn + Sn d. Cu + Zn + Sn
  49. 49. 47 Problem Red lead is : a. PbO b. Pb2O c. Pb2O3 d. Pb3O4
  50. 50. 48 Problem Calcium acetate on dry distillation give : a. Acetic anhydride b. Acetone c. Acetaldehyde d. Ethyl alcohol
  51. 51. 49 Problem In Ni(CO)4 the oxidation state of Ni is : a. 0 b. 4 c. 8 d. 2
  52. 52. 50 Problem For the reaction 2NH3(g)  N2(g) + 3H2(g), the unit of Kp will be : a. [atm] b. [atm]3 c. [atm]-2 d. [atm]2
  53. 53. 51 Problem Which one of the following is not a colligative property ? a. Tf b. π c. Tb d.kb
  54. 54. 52 Problem The equilibrium constant for the reaction SO2(g) + 1/2O2(g)  SO3(g) and 2SO3(g)  2SO2 (g) + O2(g) are K1 and K2 respectively then : a. K2 = K1 b. K2 = K12 c. K2 = 1/K1 d. K2 = 1/K12
  55. 55. 53 Problem Iodine is formed when KI reacts with a solution of : a. ZnSO4 b. CuSO4 c. FeSO4 d. (NH4)2SO4
  56. 56. 54 Problem The metal oxide which decomposes on heating is : a. ZnO b. Al2O3 c. CuO d. HgO
  57. 57. 55 Problem Which one is not an ore of aluminium ? a. Anhydrite b. Bauxite c. Corundum d. Cryolite
  58. 58. 56 Problem Calculate the solubility of AgCl in mol/L if the solubility product constant for AgCl is 1 x 10-10 : a. 10-5 b. 10-10 c. 10-8 d. 10-7
  59. 59. 57 Problem The standard reduction potentials for Fe2+ | Fe and Sn2+ | Sn electrode are - 0.44 V and - 0.14 V respectively. The standard emf of the cell with reaction Fe2+ + Sn Fe + Sn2+ is a. + 0.30 V b. - 0. 30 V c. + 0.58 V d. - 0.58 V
  60. 60. 58 Problem The effect of catalyst in a chemical reaction is to change : a. Heat of reaction b. Activation energy required for the reaction c. Equilibrium constant d. Internal energy of the reactants
  61. 61. 59 Problem Which one of the following sterilizes the water ? a. CO2 b. O2 c. O3 d. SO3
  62. 62. 60 Problem The oxidation state of Mo in Mo2Cl84- is : a. + 4 b. - 4 c. + 1 d. + 2
  63. 63. 61 Problem Which one is the correct name of the compound ? a. 3-isopropyl-2-methyl pentane b. 3-ethyl-2,4-dimethyl pentane c. 2, 4-dimethyl-3-ethyl pentane d. none of the above
  64. 64. 62 Problem The product of the following reaction is :
  65. 65. 63 Problem The number of possible enantiomeric pairs that can be produced during mono chlorination of 2-methyl butane is : a. 2 b. 3 c. 1 d. 4
  66. 66. 64 Problem Lewisite is : CHCl a. || CHAsCl3 CHCl b. || CHAsCl4 CHCl || c. CHAsCl 2 CCl2 d. || CHAsCl2
  67. 67. 65 Problem Which of the following reactions will yield 2, 2-dibromopropane ? a. HC CH + 2HBr→ b. CH3 – C CH + 2HBr → c. CH3 – CH = CH2 + HBr → d. CH3 – CH = CHCH3 + Br →
  68. 68. 66 Problem Adding Cl2 in benzene in the presence of Fe is an example of : a. Addition b. Halogenation c. Substitution d. Elimination
  69. 69. 67 Problem The major product of nitration of benzoic acid is : a. 3-nitrobenzoci acid b. 2, 4-nitro benzoic acid c. 4-nitro benzoic acid d. 2-nitro benzoic acid
  70. 70. 68 Problem What is obtained when toluene reacts with chlorine in the presence of light ? a. Benzyl chloride b. Chlorobenzene c. Both (a) and (b) d. None of these
  71. 71. 69 Problem SN1 reaction of favoured by : a. Crowding at the alpha C-atom b. Non-polar solvents c. Small group on the carbon attached to the halogen atom d. All of the above
  72. 72. 70 Problem A compound is soluble in conc. H2SO4. It does not decolouries bromine in CCl4 but is oxidized by chromic anhydride in aqueous H2SO4 within 2 seconds, turning orange solution to blue green and then opaque. The original solution contain : a. An alkene b. An ether c. A secondary alcohol d. A primary alcohol
  73. 73. 71 Problem NaOH CO2 HCl X Y Z The end product in the reaction : C6H5OH 1400 C a. Benzoic acid b. Salicylaldehyde c. Chlorobenzene d. Salicylic acid
  74. 74. 72 Problem Propionic acid is subjected to reduction with HI in the presence of little P, the product formed is : a. Propane b. Butane c. Ethane d. Methane
  75. 75. 73 Problem Butyne-2 contains : a. sp-hybridised carbon atoms only b. sp3- hybridized carbon atoms only c. both sp2-and sp3-hybridised carbon atoms d. both sp and sp3-hybridised carbon atoms
  76. 76. 74 Problem The empirical formula of a compound is CH2. One mole of this compound has a mass of 42 g. Its molecular formula is : a. C2H4 b. CH4 c. C3H6 d. C5H12
  77. 77. 75 Problem The number of isomers of C6H14 is : a. 4 b. 6 c. 5 d. 7
  78. 78. Part II
  79. 79. 76 Problem How will you convert ? a. Ethyl alocohol to vinyl acetate b. Tolune to p-nitrobenzyl ethyl ether
  80. 80. 77 Problem The vapour density [Hydrogen = 1] of a mixture containing NO2 and N2O4 is 38.3 at 270C. Calculate the number of moles of NO2 in 100 g of the mixture.
  81. 81. 78 Problem Give reasons for the following : a. PF5 is known but NF5 is not . b. Formic acid is a stronger acid then acetic acid. c. Hydrazones of acetaldehyde and acetone are not prepared in highly acidic medium. d. Boiling point of hydrogen chloride is lower than that of hydrogen fluoride.
  82. 82. 79 Problem How will you bring about the following transformations ?
  83. 83. 80 Problem Calculate the simultaneous solubility of AgSCN and AgBr. Ksp for AgSCN and AgBr are 1.0 x 10-12 and 1.0 x 10-13 respectively
  84. 84. 81 Problem Arrange the following as indicated : a. n-butane, ethanol, water propane in order of increasing boiling point. b. Aniline, ethylamine, ethane, phenol in order of increasing base strength. c. HCHO, CH3COCH3,CH3CHO, C2H5COCH3 in order of increasing reactivity towards HCN. d. Arrange the following according to the instructions given against each. I. Na, Al, Fe, Pb, N (increasing density). II. Ca, Al, O, N (increasing para magnetism). a. 0.2 M NaOH, 0.2 M Na2CO3, 0.1 M AgNO3, 0.1 M FeSO4(NH4)2SO4.6H2O in order of increasing freezing point.
  85. 85. 82 Problem a. What do you understand by electrovalency ? Describe the characteristics of electrovalent compounds. b. Show the electronic configuration of the following compounds. a. HCl b. CH4 c. H2S d. H2O
  86. 86. 83 Problem a. Why is there no 2d or 3f orbital ? b. Deduce the possible sets of four quantum numbers when n = 2
  87. 87. 84 Problem How will you convert ? a. Methanal to ethanal b. Acetic acid to acetone c. Acetaldehyde to ethylene d. Benzene to benzoic acid e. Ethanal to chloroform
  88. 88. 85 Problem How many moles of each of the following will be present in 20 g ? a. C6H12O6 b. CH3OH c. CH3COOH d. C2H5OH e. C12H22O11
  89. 89. 86 Problem The molal elevation constant for water is 0.560 per kg of water. Calculate the boiling point of solution made by dissolving 6.0 g of urea (NH2CONH2)in 200 g of water.
  90. 90. 87 Problem Calculate the normality of resulting solution made by adding 2 drops (0.1 mL) of 0.1 N H2SO4 in 0.1 L of distilled water.
  91. 91. 88 Problem Compute the solubility of AgCl in mol/L, if the solubility product constant for AgCl is 1 x 10-10
  92. 92. 89 Problem Match the following : 1. Arrhenius a . NH4+ 2. Ostwald b. NH4OH + NH4Cl 3. Bronsted acid c. pH scale 4. Buffer solution d. BF3 5. Lewis acid e. Ionic theory 6. Sorensen f. Dilution law
  93. 93. 90 Problem What happens when : a. Acetylene is passed through an aqueous solution containing H+ and Hg2+ ions. b. Ethene mixed with air is passed under pressure over a silver catalyst at 2500C. c. Acetaldehyde is warmed with strong aqueous alkali solution. d. Ethanal is heated with excess of conc. H2SO4 at about 1600C. e. Anhydrous calcium acetate is heated.
  94. 94. 91 Problem Fill in the blanks : a. Pure chloroform is obtained by heating ……… with aqueous solution of NaOH. b. CO combines with hydrogen when heated to 350 – 3450C in presence of ZnO + Cr2O3 under pressure to give …….. c. Excess NaOH reacts with Zn to for m……….. d. Potash alum is represented by the formula ……….
  95. 95. 92 Problem Write down five reactions, when hydrogen peroxide is used as reducing agent.
  96. 96. 93 Problem Complete and balance the following equation : a. HCl + MnO2 H2O + MnCl2 + ….. b. H2SO4 + HI …… + ….. c. P4 + I2 + H2O + H2O2 K2SO4 + MnSO4 + H2O + …… d. Al4C3 + H2O …….. + ……..
  97. 97. 94 Problem Name one method used for the manufacture of : a. Nitric acid b. Sulphuric acid c. Soda ash d. Vanaspati ghee
  98. 98. 95 Problem Calculate the weight of methane in a 9.0 L cylinder at 16 atm and 270C. R = 0.08 L atm K-1 mol-1]
  99. 99. 96 Problem Give IUPAC name for the following : (a) t-butyl alcohol
  100. 100. 97 Problem Write the Lewis structure of the following by indicating bonded electron pair with dash ( -) and non-bonded electrons or electron pairs with dot (.). a. Dinbitrotetra oxide (N2O4) b. Phosphorus acid (H3PO4) c. Carbonate ion (CO32-) d. Carbon disulphide (CS2)
  101. 101. 98 Problem Complete and balance the following equations : a. Cu2+ I- Cu+ + I2 b. Fe2+ + MnO4- Fe2+ + Mn2+
  102. 102. 99 Problem State whether true or false, give one or two sentences in reasoning. a. The rate of diffusion of a gas is inversely proportional to its density. b. An aqueous solution of AlCl3 is acidic. c. Sulphur reduces hot nitric acid into NO2. d. Zinc hydroxide dissolves in excess of NaOH solution on evolve dihydrogen gas.
  103. 103. 100 Problem Give one example of each of the following : a. Perkin reaction b. Aldol condensation c. Claisen condensation d. Electrophilic substance e. Nucleophilic substance
  104. 104. FOR SOLUTIONS VISIT WWW.VASISTA.NET

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