MCQs On Reversible And Irreversible Reaction
1. The net energy change in a reversible cyclic process is
(a) 3/2 RT
(b) zero
(c) always > 0
(d) always < 0
Answer:::: (b)
2. Which of the following is an extensive property?
(a) temperature
(b) pressure
(c) mass/volume ratio
(d) energy
Answer:::: (d)
3. Which of the following represents the largest amount of energy?
(a) 1 electron volt
(b) 1 erg
(c) 1 calorie
(d) 1 joule
Answer:::: (c)
4. Which of the following is correct for an adiabatic process?
(a) 𐤃E = q
(b) q = 0
(c) q = +w
(d) P𐤃 V = 0
Answer:::: (b)
5. The mixing of gases is generally accompanied by
(a) decrease in entropy
(b) a decrease in free energy
(c) change in heat content
(d) increase in free energy
Answer:::: (b)
6. One litre atmosphere is approximately equal o
(a) 101J
(b) 8.314J
(c) 931J
(d) 19.2J
Answer:::: (a)
7. The enthalpy change for a given reaction at 298K is -x J/mol. If the reaction occurs spontaneously at 298K the entropy change at that temperature
(a) can be negative but larger than x/298
(b) can be negative but smaller than x/298
(c) cannot be negative
(d) cannot be positive
Answer:::: (b)
8. The initial energy change (𐤃U) of a process does not depend upon
(a) amount of substance undergoing the change
(b) temperature
(c) path of the process
(d) nature of substance undergoing the change
Answer:::: (c)
9. Vibrational energy is
(a) partial potential and partly kinetic
(b) only potential
(c) only kinetic
(d) neither kinetic nor potential
Answer:::: (a)
10. The total entropy change for a system and its surroundings increases if a process is
(a) exothermic
(b) endothermic
(c) reversible
(d) irreversible
Answer:::: (d)