JEE CHEMISTRY UNIT 04
QUIZ NO 4
TOTAL QUESTIONS = 20
1. The entropy of a perfectly crystalline substance at absolute zero is
A. Negative
B. Zero
C. Infinite
D. Positive
2. The enthalpy change for a reaction is independent of
A. State of reactants
B. Path taken
C. State of products
D. State of the universe
3. Which of the following is true for an adiabatic process?
A. ΔH = 0
B. q = 0
C. w = 0
D. ΔU = 0
4. Which of the following systems has maximum entropy?
A. Steam
B. Ice
C. Liquid water
D. Solid CO2
5. Which of the following is correct for a reversible process?
A. Work done is less than that in an irreversible process
B. It is infinitely slow
C. It occurs spontaneously
D. Entropy increases
6. The Gibbs free energy change at equilibrium is
A. Positive
B. Infinite
C. Negative
D. Zero
7. The enthalpy change for an endothermic reaction is
A. Infinite
B. Positive
C. Negative
D. Zero
8. The second law of thermodynamics states that
A. Entropy remains constant
B. Entropy of the universe increases
C. Entropy of the universe is zero
D. Entropy always decreases
9. The change in enthalpy (ΔH) for a reaction at constant pressure is equal to
A. q
B. w
C. ΔU
D. ΔS
10. The enthalpy change for a reaction is independent of
A. Conditions of the system
B. State of products
C. Path taken
D. State of reactants
11. The relation ΔG = ΔH - TΔS holds for
A. Cyclic process
B. Adiabatic process
C. Irreversible process
D. Isothermal process
12. Which of the following is correct for an isochoric process?
A. ΔP = 0
B. ΔV = 0
C. ΔU = 0
D. ΔT = 0
13. Which of the following processes increases entropy?
A. Freezing
B. Sublimation
C. Melting
D. Condensation
14. The standard enthalpy of formation of an element in its standard state is
A. Infinite
B. Negative
C. Positive
D. Zero
15. The entropy change for a reversible process is
A. Infinite
B. Zero
C. Positive
D. Negative
16. The second law of thermodynamics states that
A. The entropy of the universe is zero
B. The entropy of the universe decreases
C. The entropy of the universe increases
D. The entropy of the universe remains constant
17. The enthalpy of fusion is associated with
A. Solid to liquid transition
B. Solid to gas transition
C. Gas to solid transition
D. Liquid to gas transition
18. The entropy of a perfect crystal at absolute zero is
A. Negative
B. Zero
C. Positive
D. Infinite
19. At constant pressure, the heat capacity is given by
A. Cp = (∂U/∂T)_v
B. Cv = (∂H/∂T)_p
C. Cp = (∂H/∂T)_p
D. Cv = (∂U/∂T)_v
20. The value of R in the equation PV = nRT is
A. 0.0821 atm L mol^-1 K^-1
B. None of these
C. Both A and B
D. 8.31 J K^-1 mol^-1
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