exams.puchd.ac.in Chemistry CET Common Entrance Test Question Paper : Panjab University

University : Panjab University
Exam :Chemistry CET Common Entrance Test
Document Type : Question Booklet
Website : exams.puchd.ac.in

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Panjab University Chemistry CET Question Paper

Subject : Chemistry
Time : 70 minutes
Number of Questions : 60

Related : Panjab University M.E Chemical OCET Other Common Entrance Test Question paper : www.pdfquestion.in/5535.html

Maximum Marks : 120
1. Among the following molecules, which has the least surface tension –
(A) Benzene (B) Acetic acid (C) Diethyl ether (D) Chlorobenzene
2. In a reversible adiabatic change – S is
(A) Infinity (B) Zero (C) equal to CvdT (D) equal to nR In V2/V1

3. Lyophobic colloids are
(A) Reversibel colloid (B) irreversible colloids(C) protective colloids (D) proteins

4. Which of the statement is correct –
(A) Physical adsorption is a multilayer phenomenon
(B) Chemical adsorption is a function of adsorbate only
(C) The extent of physical adsorption increases with increase in pressure
(D) Physical adsorption is a monolayer phenomenon

5. 2 mol of an ideal gas expands isothermally and reversibly
(A) 4·98 K (B) 11·47 K (C) –11·47 kJ (D) 0 kJ
6. Zn | Zn2+ (0·1 M) | | Fe2+ (0·001 M) | Fe.
(A) 100·32/0·0591 (B) 100·32/0·0295 (C) 100·26/0·0295 (D) 100·32/0·295

7. If all the species are in their standard states,
(A) Br– (B) Zn2+ C) Fe2+ (D) Co3+
8. However great the pressure, a gas cannot be liquefied above its
(A) Boyle temperature (B) inversion temperature
(C) critical temperature (D) room temperature

9. Consider the equation Z = pV/RT. Which of the following statements is correct –
(A) when Z > 1, real gases are easier to compress than the ideal gas.
(B) when Z = 1, real gases get compressed easily.
(C) when Z > 1, real gases are difficult to compress.
(D) when Z = 1, real gases are difficult to compress.

10. The enthalpy of neutralization of an acid by a strong base
(A) +228·52 kJ mol–1 (B) –114·26 kJ mol–1
(C) –228·52 kJ mol–1 (D) +114·26 kJ mol–1

11. Which of the following statements is incorrect –
(A) The entropy of an isolated system increases in an irreversible process.
(B) The entropy of an isolated system remains unchanged in a reversible process.
(C) Entropy can never decrease
(D) – S (system) as well as – S (surroundings) are negative quantities

12. The unit cell of CO2(s) is
(A) fcc (B) bcc (C) linear (D) hcp
13. A compound alloy of gold and copper crystallizes
(A) Au3Cu (B) AuCu3 (C) Au4Cu (D) AuCu2

14. The osmotic pressures of equimolar solutions of BaCl2,
(A) NaCl > C12H22O11 > BaCl2 (B) BaCl2 > NaCl > C12H22O11
(C) NaCl > BaCl2 > C12H22O11 (D) C12H22O11 > NaCl > BaCl2
15. Calculate the ebullioscopic constant for water.
(A) 0·512 K kg mol–1 (B) 1·86 K kg mol–1
(C) 5·12 K kg mol–1 (D) 3·56 K kg mol–1

16. An acetic acid and sodium acetate buffer has pH = 5·36. The ratio of concentration [OAc]/[HOAc] is (pKa of acetic acid = 4·76) :
(A) 6 : 1 (B) 4 : 3
(C) 1 : 1 (D) 4 : 1

17. The saponification of ethyl acetate is a
(A) Zero order (B) half order
(C) second order (D) third order

18. The rate constant, the activation energy and the pre-exponential factor of a chemical reaction at 25ºC are 8·0×10–4 s–1, 112 kJ mol–1 and 4×1015 s–1 respectively. The value of the rate constant as T → ∞ is
(A) 8×1016 s–1 (B) 4×104 s–1
(C) 4×1015 s–1 (D) 112×1012 s–1

19. When –ln K is plotted against 1/T using the Van’t Hoff equation, a straight line is expected with the slope equal to
(A) ΔHº/RT (B) –ΔHº/R
(C) ΔHº/R (D) R/ΔHº

20. For the reaction H2(g) + I2(g) ⇐⇒ 2HI(g) The equilibrium constant Kp depends on the
(A) Total pressure (B) Catalyst
(C) amount of H2 and I2 (D) temperature

21. Inductive effect involves :
(A) Displacement of σ electrons (B) Displacement of π electrons
(C) Delocalization of π electrons (D) Delocalization of σ electrons

22. Acetone reacts with HCN to form cyanohydrine. It is an example of :
(A) Electrophilic addition (B) Nucleophilic addition
(C) Nucleophilic substitution (D) Electrophilic substitution

23. Increasing order of stability among the three main conformations (i.e. eclipse, anti, gauche) of ethane is :
(A) Eclipse < gauche < anti (B) Gauche < eclipse < anti
(C) Eclipse < anti < gauche (D) Anti < gauche < eclipse

24. Acid catalyzed hydration of 2-phenyl propene gives :
(A) 1-Phenyl-2-propanol (B) 2-Phenyl-1-propanol
(C) 3-Phenyl-1-propanol (D) 2-Phenyl-2-propanol

25. The most suitable reagent for conversion of 2-hexyne to cis-2-hexene is :
(A) Na/liq. NH3 (B) Lindlar catalyst
(C) LiAlH4/THF (D) Pt/H2