This document contains a chemistry exam from 2007 with 40 multiple choice questions covering various topics: 1. Electrochemistry questions involving standard reduction potentials. 2. Equilibrium constants for reaction of N2 and O2. 3. Radioactive decay and half-life calculations. 4. Organic chemistry reactions like Friedel-Crafts acylation. 5. Properties of acids and bases. 6. Characteristics of polymers, transition metals, and coordination compounds. 7. Stoichiometry, gas laws, thermochemistry, and other general chemistry principles.

1. AMU –PAST PAPERS
CHEMISTRY- UNSOLVED PAPER - 2007

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
Sn4+ + 3e- Sn2+ Eo = 0.13V
Br2 + 2e- 2Br- Eo = 1.08 V
Calculate Kep for the cell reaction for the cell formed by two electrodes
1041
1032
10-32
10-42

4. 02 Problem
Consider the reaction
Give the equilibrium constant for the formation of N2O4 from N2 and O2
1 1
a. 2
K1 K2
1
b. K1K2
1
c. K1K2
K2
d. K1

5. 03 Problem
Half-life of radioactive element is 16 h. What time it will take for 75%
disintegration ?
a. 32 days
b. 32 h
c. 48 h
d. 16 h

6. 04 Problem
Friedel – Craft acylation can be given by
a.
b.
c.
d. R–O-R

7. 05 Problem
Which of the following is having maximum acidic strength ?
a.
b.
c.
d.

8. 06 Problem
For the reaction Na2CO3 + 2HCl NaCl + H2O + CO2
Equivalent weight of Na2CO3 is :
a. M/2
b. M
c. 2M
d. M/4

9. 07 Problem
Excited state configuration of Mn2+ is
4
a. t2 g
3 2
b. t2g eg
4 2
c. t2g eg
5 0
d. t2g eg

10. 08 Problem
Which of the following is thermosetting polymer ?
a. Nylon-6
b. Bakelite
c. Nylon-66
d. SBR

11. 09 Problem
AgNO3
X HNO3
Yellow or white ppt. Which of the following cannot be X ?
a.
b. (CH3) CHCl
c.
d.

12. 10 Problem
Rate of a reaction can be expressed by following rate expression
Rate=k[A]2 [B], if concentration of A is increased by 3 times, and concentration
of B increased by 2 times, how many times rate of reaction increases?
a. 9 times
b. 27 times
c. 18 times
d. 8 times

13. 11 Problem
What is the reason for unusual high b.p of water?
a. Due to the presence H+ and OH- ions in water
b. Due to dipole-dipole interactions
c. Due to London forces
d. Strong London forces

14. 12 Problem
Shine at freshly cut sodium is because of
a. Due to oscillation of free electrons
b. Due to weak metallic bonding
c. Due to by absorption of light in crystal lattice
d. Due to pressure of free valency at the surface

15. 13 Problem
Most acidic oxide among the following is
a. Cl2O5
b. Cl2O
c. Cl2O3
d. Cl2O7

16. 14 Problem
.
a.
b.
c.
d.

17. 15 Problem
Which of the following statements is wrong?
a. Metals are more then non metals
b. There are only few metalloids
c. Hydrogen can be placed with alkali metals as well as with halogen in periodic
table
d. Non metals are more than metals

18. 16 Problem
What volume of M/10 NaOH added in 50 mL, M/10 acetic solution to get a
buffer solution having highest buffer capacity?
a. 50mL
b. 25mL:
c. 10mL
d. 40mL

19. 17 Problem
Monomers of nucleic acid is
a. Nucleotides
b. Nucleoxides
c. Aminoacids
d. Carboxylic acid

20. 18 Problem
If the volume containing gas is compressed to half, how many moles gas
remained in the vessel?
a. Just double
b. Just half
c. Same
d. More than double

21. 19 Problem
At same temperature calculate the ratio of average velocity of SO2 to
CH4
a. 2:3
b. 3:4
c. 1:2
d. 1:6

22. 20 Problem
If temperature of 1 mole of gas is increased by 500C, calculate the change in
kinetic energy of the system
a. 623.25J
b. 6.235J
c. 623.5J
d. 6235.0J

23. 21 Problem
Give name of the complex, name should specify the position of ligands.
a. Bistransphosphinecarbonylchloroiridium [II]
b. carbonylchlrobistransphosphineridium [III]
c. carbonylchlrobistrasphosphineridium [I]
d. chiorocarbonylbistranssphosphineriridium [I]

24. 22 Problem
Ozonolysis products of an olefin are and Olefin is
a.
b.
c.
d.

25. 23 Problem
A bubble of volume V1 is in the bottom of a pond at 150C and 1.5 atm pressure
of 1atm
V2
At 250C and have volume V2, give
V1
a. 15.5
b. 0.155
c. 155.0
d. 1.55

26. 24 Problem
Volume of 0.6M NaOH required to neutralize 30 cm3 of 0.4 M HCL is
a. 20 cm3
b. 40 cm3
c. 45 cm3
d. 30 cm3

27. 25 Problem
The orbital angular momentum of an electron in 3 s orbital is
1 h
a. .
2 2
h
b. 2
c. 1 h
.
3 2
d. zero

28. 26 Problem
Decomposition of H2O2 is prevented by
a. KOH
b. MnO2
c. Acetanilide
d. Oxalic acid

29. 27 Problem
The bad smelling substance formed by the action of alcoholic caustic potash on
chloroform and aniline is
a. Nitrobenzene
b. Phenyl isocynaide
c. Phenyl cyanide
d. Phenyl isocyanide

30. 28 Problem
What is the EAN of nickel in Ni(CO)4 ?
a. 38
b. 30
c. 36
d. 32

31. 29 Problem
P4 + 3NaOH + 3H2O A + 3NaH2PO2 here A is
a. NH3
b. PH3
c. H3PO4
d. H3PO3

32. 30 Problem
If solubility of calcium hydroxide is , then its solubility product will be
a. 27
b. 3
c. 9
d. 3

33. 31 Problem
Which of the following compounds is optically active ?
a. (CH3)2CHCH2OH
b. CH3CH2OH
c. CCL2F2
d. CH3CHOHC2H5

34. 32 Problem
Which compound is soluble in water ?
a. CS2
b. C2H5OH
c. CCL4
d. CHCL3

35. 33 Problem
In a cubic structure of diamond which is made from X and Y, where X are at the
corners of the cube and Y at the face cehters of the cube. The molecular formula
of the compound is
a. X2Y
b. X3Y
c. XY2
d. XY3

36. 34 Problem
Bithonal is an example of
a. Disinfectant
b. Antiseptic
c. Antibiotic
d. Analgesic

37. 35 Problem
A and B in the following reactions are
a.
b.
c.
d. A + RR’CH2CN,B=NaOH

38. 36 Problem
Structure of XeF5+ ion is
a. Trigonal bipyramidal
b. Square pyramidal
c. Octahedral
d. Pentagonal

39. 37 Problem
Mark out the most unlike form of polymerization of CH2
a.
b.
c.
d.

40. 38 Problem
Å
R3 N - CH = CH 2 ¾ HBr ®
¾
Å
a. R3 N - CH - CH 3
Br
Å
b. R3 N - CH 2 - CH 2 - Br
Å e
c. CH 2 = CH - N R3 B r
d. No reaction

41. 39 Problem
Markout the enthalpy of formation of carbon monoxide (CO)
Given, C(s)+O2(g) CO(g) H = - 393.3 kJ/mol
1
CO(g) + O2(g) CO2(g) H= - 282.8 kJ/mol
2
a. 110.5 kJ/mol
b. 676.1 kJ/mol
c. 282.8 kJ/mol
d. 300.0 kJ/mol

42. 40 Problem
The magnetic moment of a transition metal ion is 3,87 BM. The number of
unpaired Electrons present in it is
a. 2
b. 3
c. 4
d. 5

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