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.

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

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