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AMU - Chemistry - 2005

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  • 1. AMU –PAST PAPERSCHEMISTRY- UNSOLVED PAPER - 2005
  • 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. 01 Problem A solution is prepared by dissolving 24.5 g of sodium hydroxide in distilled water to give 1 L solution. The molarity of NaOH in the solution is : a. 0.2450 M b. 0.6125 M c. 0.9800 M d. 1.6326 M (Given that molar mass of NaOH = 40.0 g mol-1)
  • 4. 02 Problem An electron with values 4, 3, -2 and + for the set of four quantum numbers n, l, ml and ms, respectively belongs to : a. 4 s orbital b. 4 p orbital c. 4 d orbital d. 4 f orbital
  • 5. 03 Problem The electronic configuration ( 1s)2 ( *1s)2( 2s)2( 2 px )2( 2 py )2(2 pz )2( * 2 py )2( * 2 pz)1 can be assigned to : a. O2 b. O  2  c. O 2 2 d. O 2
  • 6. 04 Problem What is the number of tetrahedral voids per atom in a crystal ? a. 1 b. 2 c. 6 d. 8
  • 7. 05 Problem In a osmotic pressure measurement experiment, a 5% solution of compound ‘X’ is found to be isotonic with a 2% acetic acid solution. The gram molecular mass of ‘X’ is : a. 24 b. 60 c. 150 d. 300
  • 8. 06 Problem On passing 0.5 Faraday of electricity through molten sodium chloride, sodium deposited at cathode will be : a. 29.25 g b. 11.50 g c. 58.50 g d. 0.0g
  • 9. 07 Problem The rate constant of a reaction is 3.00 x 103 L mol-1 sec-1. The order of this reaction will be : a. Zero b. First c. Second d. Third
  • 10. 08 Problem The value of E for combustion of 16 g of CH4 is – 885389 J at 298 K. The H combustion of CH4 in J mol-1 at this temperature will be : a. - 55337 b. - 880430 c. - 885389 d. - 890348 (Given that R = 8.314 JK-1 mol-1)
  • 11. 09 Problem When two moles of hydrogen expands isothermally against a constant pressure of 1 atm, at 250C from 15 L to 50 L, the work done (in litre atm) will be : a. 17.5 b. 35 c. 51.5 d. 70
  • 12. 10 Problem The enthalpy change for the transition of liquid water to steam is 40.8 kJ per mol at 1000C. The entropy change for the process will be : a. 0.408 JK-1 mol-1 b. 408 JK-1 mol-1 c. 109.4 JK-1 mol-1 d. 0.1094 JK-1 mol-1
  • 13. 11 Problem The entropy change for the reaction H2(g) + Cl2(g) 2 HCl(g), will be : a. 20 JK-1 mol-1 b. - 20 JK-1 mol-1 c. 167 JK-1 mol-1 d. -167 JK-1 mol-1 [Given that S0 (HCl) = 187 JK-1 mol-1, So(H2) = 131 JK-1 mol-1, and So(Cl2) = 233 JK-1 mol-1]
  • 14. 12 Problem If the temperature of 500 mL of air increases from 270C to 420C under constant pressure, then the increase in volume shall be : a. 15 mL b. 20 mL c. 25 mL d. 30 mL
  • 15. 13 Problem Which of the following pair of structures is an example of diastereomers ? a. b. c. d.
  • 16. 14 Problem Which of the following pair of compounds is not an example of structural isomers ? a. b. c. d.
  • 17. 15 Problem The systematic (IUPAC) name of the compound with the following structural formula shall be : a. 1-ethyl-2-methyl cyclohexene b. 2-methyl-1-2thyl cyclohexene c. 3-ethyl-2-methyl cyclohexene d. 4-ethyl-3-methyl cyclohexene
  • 18. 16 Problem Which of the following compounds will form alcohol on treatment with NaNO2, HCl/H2O at 00C a. (CH3)2CHNH2 b. C6H5NH2 c. d.
  • 19. 17 Problem In the nucleophilic substitution reactions (SN2 or SN1), the reactivity of alkylhalides follows the sequence : a. R – I > R – Br > R – Cl > R - F b. R – Cl > R – F > R – Br > R – 1 c. R – F > R – Cl > R – Br > R- I d. R – I > R – F > R – Cl > R – Br
  • 20. 18 Problem Compound ‘A’ reacts with alcoholic KOH to yield compound ‘B’, which on ozonolysis followed by reaction with Zn/H2O gives methanal and propanal. Compound ‘A’ is : a. 1-propanol b. 1-butanol c. 1-chlorobutane d. 1-chloropentane
  • 21. 19 Problem In the reaction sequence Compound ‘X’ is: a. Chlorobenzene b. Benzene c. Toluene d. Biphenyl methane
  • 22. 20 Problem HBr AgCN [H ] In the sequence of reactions C2 H4  X  Y  Z, compound ‘Z’  2H / Ni  is : a. N-methyl ethanamine b. N-propylamine c. N,N-dimehtylamine d. Ethyl cyanide
  • 23. 21 Problem  CH CH MgBr HO In the reaction sequence, A  B  C5H12O compound ‘A’ is : 3 2  3  a. 1-propanol b. propanal c. ethanal d. 2-propanol
  • 24. 22 Problem Which of the following compounds is weakest acid ? a. b. c. d
  • 25. 23 Problem The acetophenone can be converted to ethylbenzene by reaction with : a. LiAlH4 b. H2NOH c. Pd/BaSO4 – H2 d. Zn – Hg/HCl
  • 26. 24 Problem Which of the following hydroxides is amphoteric in nature ? a. Be(OH)2 b. Mg(OH)2 c. Ca(OH)2 d. Ba(OH)2
  • 27. 25 Problem Number of electrons in 3d orbital of V2+, Cr2+, Mn2+ and Fe2+ are 3, 4, 5 and 6, respectively. Which of the following ions will have largest value of magnetic moment ( ) ? a. V2+ b. Cr2+ c. Mn2+ d. Fe2+
  • 28. 26 Problem The co-ordination compounds [Co(NH3)6]3+ [Cr(CN)6]3- and [Co(NH3)6]3+ [Cr(CN)6]3- are the examples of : a. Linkage isomerism b. Co-ordination isomerism c. Ionization isomerism d. Geometrical isomerism
  • 29. 27 Problem 238 The spontaneous disintegration 92 U by loss of eight -particles and six -particles terminates at : 210 a. 82 Ra 210 b. 84 Po 228 c. 90 Th 206 d. 82 Pb
  • 30. 28 Problem The relative Lewis acid character of boron trihalides follows the sequence : a. BF3 > BCl3 > BBr3 > BI3 b. BI3 > BBr3 > BCl3 > BF3 c. BCl3 > BF3 > BI3 > BBr3 d. BI3 > BBr3 > BF3 > BCl3
  • 31. 29 Problem The tendency for catenation in Group 14 elements varies in the order : a. C >> Si > Ge = Sn > Pb b. C << Si < Ge = Sn < Pb c. C >> Si < Ge < Sn < Pb d. C >> Si = Ge = Sn > Pb
  • 32. 30 Problem The thermal stability of CF4 is : a. Less than SiF4 b. More than SiF4 c. Less than CCl4 d. Less than SiCl4
  • 33. 31 Problem Which of the following enzymes hydrolyses starch to glucose ? a. Amylase b. Invertase c. Lactase d. Maltase
  • 34. 32 Problem Which of the following reactions is an example of heterogeneous catalysis ? Cl a. O3 + O  2 O2 (gas phase)  NO b. 2 CO(g) + O2(g)   2 CO2(g) c. Cu, ZnO Cr2O3 d. CO(g) + 2H2 (g)  CH3OH(l)
  • 35. 33 Problem If one strand of DNA has the sequence T A T G A C T G, the sequence in the complimentary strand would be : a. A T A C A C T C b. A C G T T G A C c. A T A C T G A C d. A T A C T G C A
  • 36. 34 Problem Which of the following hormones is excreted from adrenal cortex ? a. Cortisone b. Estrogen c. Progesterone d. Testosterone
  • 37. 35 Problem Which of the following compounds is an azo dye ? a. Martius yellow b. Malachite green c. Methyl orange d. Mercurochrome
  • 38. 36 Problem Which of the following is a thermosetting polymer ? a. Bakelite b. Polystyrene c. Polyethene d. Terylene
  • 39. 37 Problem The carbohydrate that will yield glucose and fructose on homogeneous catalytic hydrolysis in presence of dilute sulphuric acid, is : a. Cellulose b. Maltose c. Starch d. Sucrose
  • 40. 38 Problem The gas that is not considered as a ‘green house gas’ is : a. CO2 b. CH4 c. O2 d. O3
  • 41. 39 Problem The enzyme that is used to dissolve blood clot is : a. Trypsin b. Renin c. Streptokinase d. Tyrosinase
  • 42. 40 Problem Which of the following compounds is known as the antisterlity factor ? a.  -tocopherol b. Retinol c. Calciferol d. Pyridoxine
  • 43. FOR SOLUTIONS VISIT WWW.VASISTA.NET