JEE CHEMISTRY UNIT 04
QUIZ NO 1
TOTAL QUESTIONS = 20
1. Which of the following is a state function?;Work;Heat;Enthalpy;Distance;C
A.
B.
C.
D.
2. Which of the following represents Gibbs free energy?
A. G = H + TS
B. G = H/T
C. G = TS - H
D. G = H - TS
3. The enthalpy of formation of an element in its standard state is
A. Infinite
B. Negative
C. Zero
D. Positive
4. The third law of thermodynamics is associated with
A. Entropy
B. Enthalpy
C. Internal energy
D. Gibbs free energy
5. In an adiabatic process, the heat exchanged is
A. Infinite
B. Zero
C. Negative
D. Positive
6. For a spontaneous process, the change in Gibbs free energy is
A. Zero
B. Positive
C. Negative
D. Infinite
7. In a cyclic process, the change in internal energy is
A. Infinite
B. Zero
C. Negative
D. Positive
8. Which of the following represents a spontaneous process?
A. ΔG < 0
B. ΔG > 0
C. ΔH > 0
D. ΔS < 0
9. The standard enthalpy of formation of which of the following is zero?
A. CH4
B. H2O
C. C(graphite)
D. CO2
10. The internal energy change (ΔU) in a cyclic process is
A. Positive
B. Zero
C. Negative
D. Infinite
11. The enthalpy change for a reaction at constant pressure is equal to
A. ΔU
B. w
C. ΔG
D. q
12. The relationship between enthalpy and internal energy is
A. H = U + PV
B. H = U × PV
C. H = U - PV
D. H = U/PV
13. At equilibrium, the change in Gibbs free energy is
A. Zero
B. Positive
C. Negative
D. Infinite
14. The enthalpy of a system is given by
A. H = U - PV
B. H = UP/V
C. H = U + PV
D. H = U/PV
15. For a reaction to be spontaneous at all temperatures, which of the following is true?
A. ΔH > 0, ΔS < 0
B. ΔH < 0, ΔS > 0
C. ΔH < 0, ΔS < 0
D. ΔH > 0, ΔS > 0
16. Which of the following statements is true for an isothermal process?
A. None of these
B. ΔT = 0
C. ΔU = 0
D. Both A and B
17. The relationship between ΔG and equilibrium constant K is
A. ΔG = K ln(RT)
B. ΔG = RT ln(K)
C. ΔG = -K ln(RT)
D. ΔG = -RT ln(K)
18. The work done by a gas in an isothermal reversible expansion is maximum when
A. Heat is zero
B. Pressure is constant
C. Volume is constant
D. Temperature is high
19. The heat change at constant volume is equal to
A. q
B. ΔH
C. ΔU
D. ΔG
20. Which of the following statements is correct for the second law of thermodynamics?
A. Entropy is always zero
B. Entropy of an isolated system can decrease
C. Entropy of the universe increases in a spontaneous process
D. Entropy of a system is always conserved
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