1. VIT – 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
An ion leaves its regular site occupy a position in the space between the lattice
sites is called:
a. Frenkel defect
b. Schottky defect
c. impurity defect
d. vacancy defect.
4. 02 Problem
The 8 : 8 type of packing is present in :
a. MgF2
b. CsCl
c. KCl
d. NaCl
5. 03 Problem
When a solid melts reversibly:
a. H decreases
b. G increases
c. E decreases
d. S increases
6. 04 Problem
Enthalpy is equal to :
2
G/T
a. T
T P
G/T
b. T2
T P
G/T
c. T 2
T
V
d. G/T
T2
T
V
7. 05 Problem
Condition for spontaneity' in an isothermal process is :
a. G-U 0
b. G U 0
c. A W 0
d. A U>0
8. 06 Problem
Given:
2C 2O2 g 2CO2 g ; 787 k J
1
H2 g O g 2H2O l ; 286 k J
2 2
1
C2H2 g 2 O2 g 2CO2 g H2O l ; 1310 k J
2
The heat of formation of acetylene is:
a. -1802 kJ
b. +1802 kJ
c. +237 kJ
d. -800 kJ
9. 07 Problem
given the equilibrium system:
NH4 Cl s NH4 aq Cl aq =+3.5kcal/mol
What change will shift the equilibrium to the right?
a. Decreasing the temperature
b. Increasing the temperature
c. Dissolving NaCl crystals in the equilibrium mixture
d. Dissolving crystals in the equilibrium mixture
10. 08 Problem
According to Arrhenius equation, the rate constant (k) is related to
temperature (T) as :
k2 Ea 1 1
a. ln
k1 R T1 T2
k2 Ea 1 1
b. ln
k1 R T1 T2
k2 Ea 1 1
c. ln
k1 R T1 T2
Ea 1
d. ln k 2 1
k1 R T1 T2
11. 09 Problem
Equivalent amounts of are heated in a closed vessel till equilibrium is
obtained. If 80% of the hydrogen can be converted to HI, the at this
temperature is :
a. 64
b. 16
c. 0.25
d. 4
12. 10 Problem
For the reaction
H2 g I2 g 2HI g ,
the equilibrium constant KP changes with:
a. total pressure
b. catalyst
c. The amount H2 and I2
d. temperature
13. 11 Problem
How long (in hours) must a current of 5.0 A be maintained to electroplate 60 g
of calcium from molten ?
a. 27 h
b. 8.3 h
c. 11 h
d. 16 h
14. 12 Problem
For strong electrolytes the plot of molar conductance vs C is :
a. parabolic
b. linear
c. sinusoidal
d. circular
15. 13 Problem
2
If the molar conductance values of Ca and Cl at infinite dilution are
4
respectively 118.88 x 10 4 m2 mho mol-1 and 77.33 x 10 m2 mho mol 1
then that of CaCl2 is :
4
a. 118.88 x 10
4
b. 154.66 x 10
4
c. 273.54x 10
4
d. 196.21x 10
16. 14 Problem
The standard reduction potentials at 298 K for the following half reactions are
given against each :
Zn2 aq 2e Zn s Eo 0.762 V
Cr3 aq 3e Cr s Eo 0.740 V
2H aq 2e H2 g Eo 0.00 V
Fe3 aq 3e Fe2 aq Eo 0.762 V
The strongest reducing agent is:
a. Zn(s)
b. Cr(s)
c. H2 g
2
d. Fe aq
17. 15 Problem
The epoxide ling consists of which of the following :
a. three membered ring with two carbon and one oxygen
b. four membered ring with three carbon and one oxygen
c. five membered ling with four carbon and one oxygen
d. six membered ling with five carbon and one oxygen
18. 16 Problem
In the Grignard reaction, which metal forms an organometallic bond?
a. Soldiery
b. Titanium
c. Magnesium
d. Palladium
19. 17 Problem
Phenol is more acidic than :
a. p-chlorophenol
b. p-nitrophenol
c. o-nitrophenol
d. ethanol
20. 18 Problem
Aldol condensation is given by:
a. tIimethylacetaldehyde
b. acetaldehyde
c. benzaldehyde
d. formaldehyde
21. 19 Problem
Give the IUPAC name for
O O
|| ||
H3C CH2 C H2 C-CH2 C OCH3
a. etnyl-4-oxoheptanoate
b. methyl-4-oxoheptanoate
c. ethyl-4-oxohexanoate
d. methyl-4-oxohexanoate
22. 20 Problem
In which of the below reaction do we find ,a, unsaturated carbonyl compounds
undergoing a ling closure reaction with conjugated dienes?
a. Perkin reaction
b. Diels-Alder reaction
c. Claisen rearrangement
d. Hofmann reaction
23. 21 Problem
The catalyst used in Rosenmund reaction is :
a. Zn/Hg
b. Pd / BaSO 4
c. Raney Ni
d. Na in ethanol
24. 22 Problem
H2O ?
CH2CO 2
O RMgX
a. ROOC CH2 COOR
b. ROOC CH2 COOR
c. RCOOR
d. RCOOH
25. 23 Problem
Identify, which of the below does not possess any element of symmetry?
a. (+)(-) tariaricacid
b. Carbon tetrachloride
c. Methane
d. Meso-tartaric acid
26. 24 Problem
The weakest acid amongst the following is :
a. ClCH2 COOH
b. HCOOH
c. ClCH2 COOH
d. CH2 l COOH
27. 25 Problem
Urea on slow, heating gives:
a. NH2 CONHNO 2
b. NH2 CONHCONH2
c. HCNO
d. NH2 CONH2 . HNO3
28. 26 Problem
Trans esterification is the process of :
a. conversion of an aliphatic acid to ester
b. conversion of an aromatic acid to ester
c. conversion of one ester to another ester
d. conversion of an ester into its
29. 27 Problem
Components namely acid and alcohol The correct sequence of base strengths in
aqueous solution is :
a. CH3 2 NH CH3NH2 CH3 3 N
b. CH3 N CH3 2
NH CH3NH2
c. CH3 3 N CH3NH2 CH3 2 NH
d. CH3 2 NH CH3 2 N CH3NH2
30. 28 Problem
When aqueous solution of benzene diazoniumchloride is boiled, the product
formed is :
a. C6H5 CH2 OH
b. C 6H6 N2
c. C6H5COOH
d. C6H5 COOH
31. 29 Problem
Carbylamines reaction is given by aliphatic:
a. primary amine
b. secondary amine
c. tertiary amine
d. quaternary ammonium salt
32. 30 Problem
NH3
C6H5CHO ?
a. C6H5CHN 2 CH.C6H5
b. C H NHCH
6 5 3
c. C6H5CH2NH2
d. C6H5NHC6H5
33. 31 Problem
In TeCl4, the central atom tellurium involves:
3
a. sp hybridisation
3
b. sp d hybridisation
3
c. sp d hybridisation
3
d. sp d hybridisation
34. 32 Problem
Which of the following compounds volatilises on heating?
a. MgCl2
b. HgCl2
c. CaCl2
d. FeCl3
35. 33 Problem
235 90
A nuclear reaction of 92 U with a neutron produces 36 Kr and two
neutrons. Other element produced in this reaction is :
137
a. 52 Te
144
b. 55 Cs
137
c. 56 Ba
144
d. 56 Ba
36. 34 Problem
AgCI dissolves in a solution of NH3 but not in water because :
a. NH3 is a better solvent than H2 O
b. NH3 is a better solvent than H2 O
c. NH3 is a stronger base than H2 O
d. the dipole moment of water is higher than NH3
37. 35 Problem
Which of the following is hexadentate ligand?
a. Ethylene diamine
b. Ethylene diamine tetra acetic acid
c. 1, 10-phenanthroline
d. Acetyl acetonato
38. 36 Problem
A coordiante bond is a dative covalent bond, Which of the below is true?
a. Three atom form bond by sharing their electrons
b. Two atom form bond by sharing their electrons
c. Two atoms form bond and one of them provides both electrons
d. Two atoms form bond by,sharing electrons obtained from third atom
39. 37 Problem
Which of the following complex has zero magnetic ~oment (spin only)?
a. Ni NH3 6
Cl2
b. Na3 FeF6
c. Cr H2 O 6
SO4
d. K 4 Fe CN 6
40. 38 Problem
2
The IUPAC name of Ni PPh3 2
Cl2 is :
a. bis dichloro (triphenylphosphine) nickel
b. dichloro bis (triphenylphosphine) nickel
c. dichloro triphenylphosphine nickel (II)
d. triphenyl phosphine nickel (II) dichloride
41. 39 Problem
Among the following the compound that is both paramagnetic and coloured is
:
a. K 2 Cr2 O7
NH4 TiCl6
b. 2
c. VOSO 4
d. K 3 Cu CN 4
42. 40 Problem
On an X-ray diffractipn photograph the intensity of the spots depends on:
a. neutron density of the atoms/ions
b. electron density of the atoms/ions
c. proton density of the atoms/ions
d. photon density of the atoms/ions
