The document provides a chemistry exam paper from 2005 containing 40 multiple choice questions testing knowledge of topics including stoichiometry, atomic structure, thermodynamics, organic chemistry, coordination chemistry, and biochemistry. The questions cover the calculation of molarity from mass and volume, assigning electronic configurations to atoms and ions, determining enthalpy and entropy values in chemical reactions, identifying reaction mechanisms and products, describing properties of coordination complexes and group 14 elements, outlining enzyme functions, and more.

1. AMU –PAST PAPERS
CHEMISTRY- 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

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