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AMU - Chemistry - 2004

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Vasista Vinuthan

The document provides a chemistry exam paper from 2004 containing 40 multiple choice questions testing various concepts in chemistry. The questions cover topics such as photon mass, quantum numbers, bond orders, molecular orbitals, acidity trends, coordination complexes stability, hydrogenation reactions, isomerism, hybridization, electrode potentials, nuclear reactions, organic naming/structure, polymers, DNA, dyes, and pharmaceutical drugs.

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AMU –PAST PAPERS CHEMISTRY- UNSOLVED PAPER - 2004
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
01 Problem The mass of a photon with wavelength 3.6 Å is : a. 6.135 x 10-29 kg b. 3.60 x 10-29 kg c. 6.135 x 10-33 kg d. 3.60 x 10-27 kg
02 Problem An electron with values 4, 2, -2 and +1/2 for the set of four quantum numbers n, l, m1 and s respectively, belongs to : a. 4s orbital b. 4p orbital c. 4d orbital d. 4f orbital
03 Problem 2 The bond order of O2 , O2 , O2 and O2 varies in the order : a. O2 O2 2 O2 O2 2 b. O2 O2 O2 O2 2 c. O2 O2 O2 O2 2 d. O2 O2 O2 O2
04 Problem Molecular orbital electronic configuration for ‘X’ anion is : KK * ( 2s)2 ( * 2s)2 ( 2px )2 ( 2py )2 ( 2pz )2 ( * 2px )1 . The anion ‘X’ is : a. N2 b. O2 2 c. N2 d. O2 2
05 Problem Which of the following statements is incorrect ? a. Pure aluminium oxide is obtained by heating aluminium hydroxide. b. Cryolite lowers down the melting temperature of bauxite in the electrolytic cell for extraction of aluminium. c. Carbonate ores are converted into oxides by roasting ore in air. d. Mercury cannot be produced by roasting the ore cinnabar in air.
06 Problem The relative Lewis acid character of boron trihalides is in the order : a. BI3 > BBr3 > BF3 > BCl3 b. BI3 > BBr3 > BCl3 > BF3 c. BF3 > BCl3 > BBr3 > Bl3 d. BCl3 > BF3 > BI3 > BBr3
07 Problem Which of the following metals is most reactive towards water ? a. Na b. K c. Rb d. Cs
08 Problem Which of the following molecules has pentagonal bipyramidal shape : a. PF5 b. SF6l c. XeF6 d. [Fe(CN)6]3-
09 Problem The acidity of hydrides of O, S, Se, Te varies in the order : a. H2O > H2S > H2Se > H2Te b. H2O > H2S < H2Se < H2Te c. H2S > H2O > H2Se > H2Te d. H2Se > H2S > H2O > H2Te
10 Problem The stability of complexes of Cu2+, Ni2+, Co2+ and Fe2+ varies in the order : a. Cu2+ > Ni2+ > Co2+ > Fe2+ b. Cu2+ > Fe2+ > Ni2+ > Co2+ c. Ni2+ > Co2+ > Fe2+ > Cu2+ d. Cu2+ < Ni2+ < Co2+ < Fe2+
11 Problem Which of the following compounds is generally used for hydrogenation of alkenes ? a. Ni(CO)4 b. [(C6H5)3P]3RhCl c. (CH3)3Al d. (C5H5)2Fe
12 Problem The example of co-ordination isomerism is : a. [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] b. [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br c. [Co(NH3)5NO3]SO4 and [Co(NH3)5SO4]NO3- d. [Pt(NH3)4Cl2]Br2 and [Pt(NH3)4Br2]Cl2
13 Problem Cow milk is an example of natural emulsion stabilized by : a. Detergent b. Fat c. Casein d. Urea
14 Problem The molal elevation constant for water is 0-.52. What will be the boiling point of 2 molar sucrose solution at 1 atm. Pressure ? (Assume B.P. of pure water as 1000C) : a. 101.040 C b. 100.260 C c. 100.520 C d. 99.740 C
15 Problem If at 250 C the ionization constant of acetic acid is 2 x 10-5, the hydrolysis constant of sodium acetate will be : a. 5 x 10-8 b. 5 x 10-9 c. 5 x 10-10 d. 4 x 10-10
16 Problem The solubility product of Ag2CrO4 in water at 2908 K is 3.2 x 10-11. What will be the concentration of CrO ions in the saturated solution of Ag2CrO4 ? a. 2 x 10-4 m b. 5.7 x 10-5 M c. 5.7 x 10-6 M d. 3.2 x 10-11
17 Problem The pKb value of NH3 is 5. Calculate the pH of buffer solution, 1 L of which contains 0.01 NH4Cl and 0.10 M NH4OH : a. 4 b. 6 c. 8 d. 10
18 Problem Calculate the entropy change for CH4(g) + H2O(g) 3H2(g) + CO(g), using the following data : Substance CH4(g) H2O(g) H2(g) CO(g) So/JK-1 mole-1 186.2 188.7 130.6 197.6 The entropy change is : a. - 46 JK-1mole-1 b. + 46 JK-1mole-1 c. - 214.5 JK-1mole-1 d. + 214.5 JK-1mole-1
19 Problem The type of hybridization in XeF4 is : a. dsp2 b. sp3d c. sp3d2 d. sp3d3
20 Problem given the electrode potentials Fe3+ + e- Fe2+, Eo = 0.771 volts I2 + 2e- 2I-,Eo = 0.536 volts 0 E cell for the cell reaction 2Fe3+ 2I- 2Fe2+ + I2, is : a. 1.006 V b. 0.503 V c. 0.235 V d. - 0.235 V
21 Problem A 4 A 3 In the general nuclear reaction Z X 2 He Z 1 Y ' D ' the product ‘D’ is : a. -particle b. -particle c. -particle d. proton
22 Problem Lassaigne’s test is not used for the detection of : a. Carbon b. Halogens c. Nitrogen d. Sculpture
23 Problem Then number of isomeric alkenes with molecular formula C6H12 are : a. 8 b. 10 c. 11 d. 13
24 Problem Which of the following alkenes will yield 2-butaneone on ozonolysis followed by the reaction with Zn/H2O ? a. 2-Methyl-2-hexene b. 2-Methyl-1-hexene c. 3,4-Dimethyl1-e-hexene d. 2, 3-Dimethyl-3-hexene
25 Problem A bromoalkane ‘X’ reacts with magnesium in dry ether to from compound ‘Y’. the reaction of ‘Y’ with methanal followed by hydrolysis yield an alcohol having molecular formula C4H10O. The compound ‘X’ is : a. Bromo ethane b. Bromo methane c. 1-bromo propane d. 2-bromo propane
26 Problem Which of the following compounds will not exhibit cis-trans isomerism ? a. b. c. d.
27 Problem Which of the following molecule is achiral ? a. b. c. d.
28 Problem Which of the following compounds will be most reactive towards nucleophilic additon reaction ? a. CH3COCH2CH2CH2CH3 b. CH3CH2COCH2CH2CH3 c. CH3CH2CH2CH2CH2CHO d.
29 Problem Which of the following compounds is the strongest acid ? a. HCOOH b. CH3COOH c. Cl2CHCOOH d. C6H5COOH
30 Problem In the reaction sequence the product ‘C’ is : a. Benzonitrile b. Benzaldehyde c. Benzoic d. Benzlyamine
31 Problem The basicity of compounds I, II, III and IV CH3NH2, (CH3)2NH, (CH3)3N, C6H5CH2NH2 I II II IV Varies in the order : a. I > II > III > IV b. II > I > III > IV c. III > I > II > IV d. IV > I > II > III
32 Problem Diethyl oxalate is used for distinguishing primary, secondary and tertiary : a. Alcohols b. Amines c. Alkyl halides d. Hydrogens in hydrocarbons
33 Problem The brown haze of photochemical smong is largely attributable to : a. NO b. NO2 c. d. CH2 = CHCH = O
34 Problem The water pollutants mainly responsible for eutrophication are : a. Cd, Pb and Hg present in industrial waste b. Heavy metals present in mining waste c. Detergents and fertilizes containing phosphate anion d. Polychlorinated biphenyls
35 Problem Which of the following is a thermosetting polymer ? a. Polyethene b. Bakelite c. Terylene d. Polystyrene
36 Problem Which of the following is an example of conjugated protein ? a. Albumin b. Globulin c. Glutelin d. Glycoprotein
37 Problem If one strand of DNA has the sequence ATCGTATG, the sequence in the complementary strand would be : a. TAGCTTAC b. TCACATAC c. TAGCATAC d. TACGATAC
38 Problem Fluorescein in an example of : a. Azo dyes b. Phthalein dyes c. Triphenyl methane dyes d. Nitro dyes
39 Problem Amphetamine is used as: a. Anaesthetic b. Antidepressant c. Antimalarial d. Anagesic
40 Problem Which of the following compounds is used as broad spectrum antibiotics ? a. Ampicillin b. Penicillin G c. Penicillin K d. Tetracyline
FOR SOLUTIONS VISIT WWW.VASISTA.NET

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AMU - Chemistry - 2004

  • 1. AMU –PAST PAPERS CHEMISTRY- UNSOLVED PAPER - 2004
  • 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 The mass of a photon with wavelength 3.6 Å is : a. 6.135 x 10-29 kg b. 3.60 x 10-29 kg c. 6.135 x 10-33 kg d. 3.60 x 10-27 kg
  • 4. 02 Problem An electron with values 4, 2, -2 and +1/2 for the set of four quantum numbers n, l, m1 and s respectively, belongs to : a. 4s orbital b. 4p orbital c. 4d orbital d. 4f orbital
  • 5. 03 Problem 2 The bond order of O2 , O2 , O2 and O2 varies in the order : a. O2 O2 2 O2 O2 2 b. O2 O2 O2 O2 2 c. O2 O2 O2 O2 2 d. O2 O2 O2 O2
  • 6. 04 Problem Molecular orbital electronic configuration for ‘X’ anion is : KK * ( 2s)2 ( * 2s)2 ( 2px )2 ( 2py )2 ( 2pz )2 ( * 2px )1 . The anion ‘X’ is : a. N2 b. O2 2 c. N2 d. O2 2
  • 7. 05 Problem Which of the following statements is incorrect ? a. Pure aluminium oxide is obtained by heating aluminium hydroxide. b. Cryolite lowers down the melting temperature of bauxite in the electrolytic cell for extraction of aluminium. c. Carbonate ores are converted into oxides by roasting ore in air. d. Mercury cannot be produced by roasting the ore cinnabar in air.
  • 8. 06 Problem The relative Lewis acid character of boron trihalides is in the order : a. BI3 > BBr3 > BF3 > BCl3 b. BI3 > BBr3 > BCl3 > BF3 c. BF3 > BCl3 > BBr3 > Bl3 d. BCl3 > BF3 > BI3 > BBr3
  • 9. 07 Problem Which of the following metals is most reactive towards water ? a. Na b. K c. Rb d. Cs
  • 10. 08 Problem Which of the following molecules has pentagonal bipyramidal shape : a. PF5 b. SF6l c. XeF6 d. [Fe(CN)6]3-
  • 11. 09 Problem The acidity of hydrides of O, S, Se, Te varies in the order : a. H2O > H2S > H2Se > H2Te b. H2O > H2S < H2Se < H2Te c. H2S > H2O > H2Se > H2Te d. H2Se > H2S > H2O > H2Te
  • 12. 10 Problem The stability of complexes of Cu2+, Ni2+, Co2+ and Fe2+ varies in the order : a. Cu2+ > Ni2+ > Co2+ > Fe2+ b. Cu2+ > Fe2+ > Ni2+ > Co2+ c. Ni2+ > Co2+ > Fe2+ > Cu2+ d. Cu2+ < Ni2+ < Co2+ < Fe2+
  • 13. 11 Problem Which of the following compounds is generally used for hydrogenation of alkenes ? a. Ni(CO)4 b. [(C6H5)3P]3RhCl c. (CH3)3Al d. (C5H5)2Fe
  • 14. 12 Problem The example of co-ordination isomerism is : a. [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] b. [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br c. [Co(NH3)5NO3]SO4 and [Co(NH3)5SO4]NO3- d. [Pt(NH3)4Cl2]Br2 and [Pt(NH3)4Br2]Cl2
  • 15. 13 Problem Cow milk is an example of natural emulsion stabilized by : a. Detergent b. Fat c. Casein d. Urea
  • 16. 14 Problem The molal elevation constant for water is 0-.52. What will be the boiling point of 2 molar sucrose solution at 1 atm. Pressure ? (Assume B.P. of pure water as 1000C) : a. 101.040 C b. 100.260 C c. 100.520 C d. 99.740 C
  • 17. 15 Problem If at 250 C the ionization constant of acetic acid is 2 x 10-5, the hydrolysis constant of sodium acetate will be : a. 5 x 10-8 b. 5 x 10-9 c. 5 x 10-10 d. 4 x 10-10
  • 18. 16 Problem The solubility product of Ag2CrO4 in water at 2908 K is 3.2 x 10-11. What will be the concentration of CrO ions in the saturated solution of Ag2CrO4 ? a. 2 x 10-4 m b. 5.7 x 10-5 M c. 5.7 x 10-6 M d. 3.2 x 10-11
  • 19. 17 Problem The pKb value of NH3 is 5. Calculate the pH of buffer solution, 1 L of which contains 0.01 NH4Cl and 0.10 M NH4OH : a. 4 b. 6 c. 8 d. 10
  • 20. 18 Problem Calculate the entropy change for CH4(g) + H2O(g) 3H2(g) + CO(g), using the following data : Substance CH4(g) H2O(g) H2(g) CO(g) So/JK-1 mole-1 186.2 188.7 130.6 197.6 The entropy change is : a. - 46 JK-1mole-1 b. + 46 JK-1mole-1 c. - 214.5 JK-1mole-1 d. + 214.5 JK-1mole-1
  • 21. 19 Problem The type of hybridization in XeF4 is : a. dsp2 b. sp3d c. sp3d2 d. sp3d3
  • 22. 20 Problem given the electrode potentials Fe3+ + e- Fe2+, Eo = 0.771 volts I2 + 2e- 2I-,Eo = 0.536 volts 0 E cell for the cell reaction 2Fe3+ 2I- 2Fe2+ + I2, is : a. 1.006 V b. 0.503 V c. 0.235 V d. - 0.235 V
  • 23. 21 Problem A 4 A 3 In the general nuclear reaction Z X 2 He Z 1 Y ' D ' the product ‘D’ is : a. -particle b. -particle c. -particle d. proton
  • 24. 22 Problem Lassaigne’s test is not used for the detection of : a. Carbon b. Halogens c. Nitrogen d. Sculpture
  • 25. 23 Problem Then number of isomeric alkenes with molecular formula C6H12 are : a. 8 b. 10 c. 11 d. 13
  • 26. 24 Problem Which of the following alkenes will yield 2-butaneone on ozonolysis followed by the reaction with Zn/H2O ? a. 2-Methyl-2-hexene b. 2-Methyl-1-hexene c. 3,4-Dimethyl1-e-hexene d. 2, 3-Dimethyl-3-hexene
  • 27. 25 Problem A bromoalkane ‘X’ reacts with magnesium in dry ether to from compound ‘Y’. the reaction of ‘Y’ with methanal followed by hydrolysis yield an alcohol having molecular formula C4H10O. The compound ‘X’ is : a. Bromo ethane b. Bromo methane c. 1-bromo propane d. 2-bromo propane
  • 28. 26 Problem Which of the following compounds will not exhibit cis-trans isomerism ? a. b. c. d.
  • 29. 27 Problem Which of the following molecule is achiral ? a. b. c. d.
  • 30. 28 Problem Which of the following compounds will be most reactive towards nucleophilic additon reaction ? a. CH3COCH2CH2CH2CH3 b. CH3CH2COCH2CH2CH3 c. CH3CH2CH2CH2CH2CHO d.
  • 31. 29 Problem Which of the following compounds is the strongest acid ? a. HCOOH b. CH3COOH c. Cl2CHCOOH d. C6H5COOH
  • 32. 30 Problem In the reaction sequence the product ‘C’ is : a. Benzonitrile b. Benzaldehyde c. Benzoic d. Benzlyamine
  • 33. 31 Problem The basicity of compounds I, II, III and IV CH3NH2, (CH3)2NH, (CH3)3N, C6H5CH2NH2 I II II IV Varies in the order : a. I > II > III > IV b. II > I > III > IV c. III > I > II > IV d. IV > I > II > III
  • 34. 32 Problem Diethyl oxalate is used for distinguishing primary, secondary and tertiary : a. Alcohols b. Amines c. Alkyl halides d. Hydrogens in hydrocarbons
  • 35. 33 Problem The brown haze of photochemical smong is largely attributable to : a. NO b. NO2 c. d. CH2 = CHCH = O
  • 36. 34 Problem The water pollutants mainly responsible for eutrophication are : a. Cd, Pb and Hg present in industrial waste b. Heavy metals present in mining waste c. Detergents and fertilizes containing phosphate anion d. Polychlorinated biphenyls
  • 37. 35 Problem Which of the following is a thermosetting polymer ? a. Polyethene b. Bakelite c. Terylene d. Polystyrene
  • 38. 36 Problem Which of the following is an example of conjugated protein ? a. Albumin b. Globulin c. Glutelin d. Glycoprotein
  • 39. 37 Problem If one strand of DNA has the sequence ATCGTATG, the sequence in the complementary strand would be : a. TAGCTTAC b. TCACATAC c. TAGCATAC d. TACGATAC
  • 40. 38 Problem Fluorescein in an example of : a. Azo dyes b. Phthalein dyes c. Triphenyl methane dyes d. Nitro dyes
  • 41. 39 Problem Amphetamine is used as: a. Anaesthetic b. Antidepressant c. Antimalarial d. Anagesic
  • 42. 40 Problem Which of the following compounds is used as broad spectrum antibiotics ? a. Ampicillin b. Penicillin G c. Penicillin K d. Tetracyline
  • 43. FOR SOLUTIONS VISIT WWW.VASISTA.NET