PU CET UG 2015 Question Paper Chemistry

CET-2015 Sr, No. : I' 124353
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Booklet Series Code : A
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O.M.R. Answer Sheet Serial No.
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Subject: CHEMISTRY
Time: 70 minutes Number of Questions: 60 Maximum Marks: 120
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Chemistry/A

1. At high pressure, van der waals equation becomes:

(A) PV=RT (B) PV= RT+ aN

(C) PV = RT -aN (D) PV= RT + Pb

2. Match the following
(X) Inversion Temperature (i) alRb

(Y) Boyle's Temperature (ii) 8a127Rb

(Z) Critical Temperature (Jiii) 2a1Rb

(A) X-i, Y-ii, ?-iii (B) X-iii, Y-ii,Z-i
(C) -X-iii, Y-i,Z-ii (D) X-i, Y-iii,Z-ii.

3. For an adiabatic process, which ofthe following relations is correct?
(A) ~E = 0 (B) P~V = 0
(C) q =0 (D) q =+w

4. The work done in ergs for a reversible expansion of one mole of an idea I gas from a volume of

10 litre to 20 litre at 25°C is:
(A) 2.303 x 8.31 x 107 x298log2 (B) 2.303 x 0.0821 x 298log2

(C) 2.303 x 0.0821 x 2981og0.5 (D) 2.303 x 2 x 298log2

5. The equilibrium constant for the reaction SOl (g) + Yz 01 (g) ~ S03 (g) is 5 X 10-1atm-\

The equilibrium constant for the reaction: 2 S03 (g) ~ 2S01 (g) + 01 (g) would be :

(A) 100atm (B) 200atm .

(C) 4 x 102 atm (D) 6.25 xl O'ntm

ChemistryIBFH-30852-A 3 [Turn over
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6. In gaseous reversible reaerion : N1(g) + 01(g) ~ 2NO(g) + heat, pressure is increased then

the equilibrium constant would be :
(A) Unchanged (B) Increased

(C) Decreased (D) First increase then decrease

7. Two moles of PCl5 are heated in a closed vessel of 2 litre capacity. When the equilibrium is
attained .40% of it has been found to be dissociated. What is the value of K c in mol/dm' ?

(A) 0.532 (B) 0.266
(C) 0.133 (D) 0.174

8. The standard emf of a galvanic cell involving cell readion with n = 2 is found to be 0.295V

at 25°C. The equilibrium constant for the readion would be ( Given : F = 96500 Cmol ' ;
R = 8.314 JK-l mol+) :
(A) 2'x 1011 (B) 4 X 1012
(C) 1 X 102 (D) 1X 1010

9. The solubility of a gas in liquid increases with:
(A) Increase in temperature

(B) Reduction of gas pressure

(C) Decrease in temperature and Increase of gas pressure
(D) Amount ofliquid taken

10. If 0.1 M solution of glucose and 0.1 M urea solution are placed on two sides of a semipermeable
membrane to equal heights then it will be eorreet to say that:
,
(A) There will be no net movement across the membrane
(B) Glucose will flow towards urea solution
(C) Urea will flow towards glucose solution

(D) Water will flow from urea solution towards glucose solution

CkemisttyIBFH-30852-A

11. The specific conductance of a 0.01 M solution of KCL is 0.0014 ehm" em" at 25°C. Its

equivalent conductance is :
(A) 14 (B) 140
(C) 1.4 (D) O.l4P

12. The oxidation potentials of Zn, Cu, Ag, H1 and Ni are 0.76, -0.34, -0.80, 0 and 0.25 volt
respectively. Which of the following reactions will provide maximum voltage?
(A) Zn + Cu2+~ Cu + Zn2+ (B) Zn + 2Ag+ ~ 2Ag + Zn2+

(C) H2 + Cu2+~ 2H+ + Cu (D) H2 + Ni2+~ 2H+ + Ni

13. The rate of Chemisorptions :
(A) Decreases with increase of pressure (B) Is independent of pressure
(C) Is maximum at one atmospheric pressure (D) Increases with increase of pressure

14. The migration of colloidal particles under the influence of an electric field is known as :
(A) Electro-osmosis (B) Brownian movement
. (C) Cataphoresis (D) Dialysis

15. The Crystalline structure ofNaCI is :
(A) Hexagonal close packed (B) Face centered cubic
(C) Square planar (D) Body-centered cubic

16.. The unit cell of AI (molar mass 27 g/mol-') has an edge length of 405 pm. Its density is
2.7 g/cmJ• The cubic unit cell is :
(A) Face-centered (B) Body-centered
(C) Edge-centered. . (D) Simple

ChemisttyIBFH-30852-A [Turn over

· 17. A graph between time (t) and substance consumed at any time t is found to be a straight line

passing through origin. This indicates that the reaction is of:

(A) Second order (B) First order

(C) Zero order (D) Fractional order

18. The reaction, X ~ Y (product) follows first order kinetics. In 40 minutes, the concentration of

X changes from 0.1 M to 0.025 M, then the rate of reaction when concentration of X is 0.01 M

is :
(A) 1.73 x 10-4Mzmin" (B) 3.47 x 10-s Mzmirr"
(C) 3.47 x 10-4Mzmirr! (D) 1.73 x 10-s Mzmin"

19. Colligative properties are applicable to :
(A) Ideal dilute solutions (B) Concentrated solutions
(C) .Non-ideal solutions (D) All of these

20. Which defect causes decrease in the density of a crystal ?..
(A) Frenkel defect (B) Schottky defect
(C) Interstitial defect (D) F-centre

21. IUPAC name for the compound given below is :

o

OH
(A) 3-Hydroxy- 5--{::hlor0--4-Pentanone (B) l-Chloro- 3-Hydroxy-2-Pentanone
(C) l--{::hloro-3-Ethyl- 3-Hydroxy-2-Propanone (D) l-Chloro-z-Oxo- 3-Hydroxypentane

22. The most stable carbocation in the following list is :
CHlCH/, C6HsCH/, (CH3)2 CH+, (C6HJ C+
(A) (C6Hs)3 C+ (B) C6HsCH2 +
(C) (CH3)2CH+ (D) CH3CH/

ChemistryIBFH-30852-A . 6
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23. The thermal decomposition of higher hydrocarbons into lower hydrocarbons is termed as :
(A) Refonning (B) Sublimation

(C) Isomerisation (D) Cracking

24. Ozonolysis of2-methylpropene followed by reduction with ZnlCHlCOOH gives:
(A) -Propionaldehyde and formaldehyde (B) Acetaldehyde and acetone

(C) Acetone and formaldehyde (D) Acetaldehyde and water

25. Acetylenic hydrogen's ofalkynes can also be replaced with heavy metal Ag" by using:
(A) Fehling's reagent '(B) Tollen's reagent
(C) Hinsberg's'reagent (D) Fenton's reagent

26. Treatment of nitrobenzene with fuming HNOl in the presence of H2S04 at 373 K affords:
(A) Tn- Dinitrobenzene (B) p- Dinitrobenzene
(C) o-Dinitrobenzene (D) Benzene

27. Presence of Chlorofluorocarbons in atmosphere leads to:
(A) Global wanning (B) Greenhouse effect

(C) Smog (D) Depletion of ozone layer

28. Which of the following gases leads to aeid rain? .

(A) CO & NO (B) S02 & N02
(C) CO2 & S02 (D) CO & N02

29. When ethylbromide is treated with sodium acetylide the preductformed is :
(A) I-Butyne (B) 2-Butene
,(C) I-Butene (D) 2-Butyne

ChemistryIBFH-30852-A 7 [Turnover
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30. Freon is used as :
(A) Agricultural pesticide (B) Fireextinguisher

(C) Refrigerant and propellant (D) Dry cleaning agent

31. Reaction of Phenol with acetic anhydride in the presence of pyridine gives:
(A) Phenyl propionate (B) Phenyl benzoate

(C) Salicylic acid (D) Phenyl acetate

32. The products formed when C2H50C1H5 reacts with cone, ID( cold) :
(A) Ethyl iodide and water (B) Ethyl alcohol and ethyl iodide
(C) Ethyl alcohol and water (D) Ethyl iodide only

33. Predict the fmal product X in the following reaction:

0=0 NH2NH2I KOH
x

(A) Cyclohexane (B) Cyclohexene'
(C) Cyclohydrazone (D) Benzene

34. The conversion of propionic acid to a-bromopropionic
. ,
acid can be achieved with the help 0
following reagent :-

(A) Br/aq KOH (B) Br/CC14
. (C) Br/P (D) PBr3

l~. When ethylamine is warmed with chloroform and alcoholic potash, Y compound is formed whicl
gives very offensive smell. The compound Y is :
(A) Ethyl isocyanate (B) Naphthalene
(C) Ethylcyanide . (D) Ehtyl isocyanide

ChemistryIBFH-30852-A 8
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36. Benzene diazonium salt can be prepared by reaction of:
(A) Aliphatic amine with nitrous acid (B) Aliphatic amine with nitric acid

(C) Aromatic amine with nitrous acid (D) Aromatic amine with nitric acid

37. The structure of silk fibroin protein corresponds to :
(A) a-Helix (8) ~-J>leated Sheet
(C) y-Coiled (D) &-Planner

38. Deficiency of Vitamin D leads to:
(A) Rickets and osteomalacia (8). Night-blindness

(C) Scurvy (D) Sterility

39. Which of the following is not an example of condensation polymer?
(A) Nylon-66 (8) Terylene
(C) Buna--S (D) Bakelite

40. The colloidal solution of soaps in water removes the greasy matter by :
(A) Adsorption (8) Coagulation

(C) Absorption (D) Emulsification

41. The highest excited state that unexcited hydrogen atoms can reach when they are bombarded
with 12.2 eV electron is :
(A) n = 1 (B) n =2
(C) n=3 (D) n=4

42. The bond length in 0/.°1,°1-. and 0/-, follows the order:
2- > 0 - > 0 > 0 +
(A) 02222 + > 0 > 0 - > 0 2-
(B) 02222
> 0 - > 0 2- > 0 +
(C) 02222 - > 0 2- > 0 + > 0
(D) 02222

ChemistryIBFH-30852-A 9 [Turnover
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43. 4.4g of CO2 and 2.24 litre of ~2 at STP are mixed in a container. The total number of molecules •

present in the container will be :
(A) 6.022 x 1023 (B) J.2044 X 1023

(C) 2mole (D) 6.023 x 1024

44. Equivalent weight of FeC20 .•in the change: FeC20 .•---------Fel+ +C02is :

(A) Ml3 (B) Ml6

(C) MI2 (D) Mil

45. Poling process is used :
(A) For the removal ofAl203 from Al (B) For the removal of'Cu.O from Cu
(C) For the removal of'Znfr from Zn (D) For the removal ofFe203 from Fe

46. Heavy water is not used for drinking because:
(A) It is poisonous
(B) It is costly.
(C) Its physiological action is different from ordinary water

(D) Its chemical properties are different from ordinary water

47. AI20l formation involves large quantity of heat evolution which makes its use in :
(A) Deoxidiser (B) Confectionery
(C) Indoorphotography (D) Thermitewelding

48. The oxidation state ofMo in its oxo-complex species [Mo20 .•(C2"Jl'(H10)lJl-is:
(A) +2 • (B) +3
(C)+4 (D)+5

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49. Wrought iron is:
(A) Pure iron with 0.1 to 0.2% C (8) PigIron

(C) An alloy of steel (D) Impure sulphide ore ofiron

50. For which one of the following ions, the colour is not due to a d-d transitions?
(A) Cr042- (8) Cu(NH3)/+
(C) TI(~O)63+ (D) CoF/+

51. Antichor is a compound:
(A) Which absorb chlorine
(8) Which removes Cl2 from amaterial

(C) Which liberates Cl2 from bleaching powder
(D) Which acts as a catalyst in the manufacture of'Cl,

52. HIS cannot be dried by passing over cone, "2S04 because:
(A) The acid oxidises it (8). The acid combines with H2S to form a salt

(C) Both form Complex (D) It dissolves in the acid

53. P4°10 has short and long P-O bonds. The number of short P-O bonds in this compound is :
(A) 1 (8) 2

(C) 3 (D) 4

54. CO2 and N2are non-supporter of combustion. However, for putting out fires CO2 is preferred

over NI and CO2 :
(A) Does not burn
. . .
'

(8) Forms non-combustible products with burning substances
(C) Is denser than nitrogen

(D) Is more reactive.

ChemistryIBFH~30852-A [Turn over

55. Addition of excess of sodium hydroxide solution to a solution of.nickel sulphate result in the
formation of a :
(A) Green precipitate (8) Pink colouration
(C) Blue precipitate (D) Violetcolouration

56. The hydride which does not act as reducing agent is :

(A) NH3 (8) CaH2
(C) NaH (D) LiAlH4

57. Newly shaped glass articles when cooled suddenly become brittle, therefore these are cooled
slowly, this process is known as :
(A) Tempering (8) Annealing

(C) Quenching (D) Galvanising

58. Liquid ammonia bottles be opened after cooling them in ice for some time. It is because liquid
NUl:
(A) Brings tears to the eyes (8) Has a high Vapour pressure
(C) Is a corrosive liquid (D) Is a mild explosive

59. Starch paper moistened with Kl solution turns blue in ozone because of:
(A) Iodine liberation (8) Oxygen liberation

(C) Alkali formation (D) Ozone reacts with litmus paper

60. The compound which can remove both oxygen and nitrogen of the air when it is passed over it
at 1000°C:
(A) CaC2 (8) CaCl2
(C) CaCN2 (D) Ca(CN)2

ChemistryIBFH-30852-A 12
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Panjab University, Chandigarh
CET(UG)-2015
FINAL ANSWERS / KEY
Subject: CHEMISTRY
Booklet Series Code: A
1 2 3 4 5 6 7 8 9 10
D C C A C A B D C A

11 12 13 14 15 16 17 18 19 20
B B D C B A C C A B

21 22 23 24 25 26 27 28 29 30
B A D C B A D B A C

31 32 33 34 35 36 37 38 39 40
D B A C D C B A C D

41 42 43 44 45 46 47 48 49 50
C A B A B C D B A A

51 52 53 54 55 56 57 58 59 60
B A D C A A B B A A

Note: An 'X' in the key indicates that either the question is ambiguous or it has
printing mistake. All candidates will be given credit for this question.