MCQs on Reversible and Irreversible Reaction

MCQs on Reversible and Irreversible Reaction

1. The net energy change in a reversible cyclic process is

1. 3/2 RT
2. zero
3. always > 0
4. always < 0

Answer: (b)

2. Which of the following is an extensive property?

1. temperature
2. pressure
3. mass/volume ratio
4. energy

Answer: (d)

3. Which of the following represents the largest amount of energy?

1. 1 electron volt
2. 1 erg
3. 1 calorie
4. 1 joule

Answer: (c)

4. Which of the following is correct for an adiabatic process?

1. ????E = q
2. q = 0
3. q = +w
4. P???? V = 0

Answer: (b)

5. The mixing of gases is generally accompanied by

1. decrease in entropy
2. a decrease in free energy
3. change in heat content
4. increase in free energy

Answer: (b)

6. One litre atmosphere is approximately equal o

1. 101J
2. 8.314J
3. 931J
4. 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

1. can be negative but larger than x/298
2. can be negative but smaller than x/298
3. cannot be negative
4. cannot be positive

Answer: (b)

8. The initial energy change (????U) of a process does not depend upon

1. amount of substance undergoing the change
2. temperature
3. path of the process
4. nature of substance undergoing the change

Answer: (c)

9. Vibrational energy is

1. partial potential and partly kinetic
2. only potential
3. only kinetic
4. neither kinetic nor potential

Answer: (a)

10. The total entropy change for a system and its surroundings increases if a process is

1. exothermic
2. endothermic
3. reversible
4. irreversible

Answer: (d)