Thermodynamics II MCQ B.Sc. Second year UG degree course Dr.BAMU Aurangabad.

B.Sc. Second year Undergraduate degree course

Semester Third

Physical Chemistry

Chapter – Thermodynamics II

Multiple Choice questions

1. When water is converted into ice its entropy
a) Increases
b) Decreases
c) Remains same
d) None of these

2. Which of the following is not state function?
a) density
b) internal energy
c) Entropy
d) Surface tension

3. A part of the universe which is under thermodynamic study is called
a) Surrounding
b) System
c) Process
d) None of these.

4. The amount of heat required to raise the temperature of one mole of the substance by 1^oK is called
a) Heat capacity
b) Molar heat
c) Molar heat capacity
d) Molar capacity.

5. Entropy is a measure of
a) randomness
b) Concentration
c) Velocity
d) Zig-Zag motion

6. Which is the correct unit for entropy?
a) Cal K mole^-1
b) JK^-1 mol^-1
c) Nm^-2
d) Jm^-2

7. The first law of thermodynamics is also known as
a) Law of mass action
b) Law of conservation of mass
c) Law of conservation of energy.
d) Law of conservation of mass and energy.

8. The expression for the work done in isothermal reversible expansion of ideal gas is given as
a) W = PΔV
b) W = P (V₁-V₂)
c) W = 2.303nRT logP₁/P₂
d) W = 2.303nRT₂ log V₂/V₁

9. A process in which volume remains constant is called as
a) Isobaric Process
b) Isochoric Process
c) Isothermal Process
d) Reversible Process

10. A well stoppered thermos flask contains some ice cubes. This is an example of
a) Closed system
b) Open system
c) Isolated system
d) Heterogeneous system

11. The expression dH/dT at constant pressure represents
a) Heat capacity at constant pressure
b) Heat capacity at constant volume
c) Enthalpy change
d) Entropy change.

12. All reversible heat engines operating between the same temperature limits have the same efficiency is a statement of
a) First law of Thermodynamics
b) Second law of Thermodynamics
c) Law of mass Action
d) Carnot's Theorem

13. Efficiency of any machine is always
a) Equal to one
b) Less than one
c) Greater than one
d) Cannot be predicted.

14. In an exothermic reaction ΔH is……
a) Positive
b) Negative
c) Zero
d) None of these

15. An isochoric process takes place at constant.....
a) Pressure
b) Temperature
c) Volume
d) Concentration.

16. The first law of thermo dynamics is merely the law of.
a) Conservation of energy
b) Conservation of mass
c) Both (a) and (b)
d) All of these.

17. The cycle of processes which occurs under reversible condition is referred to as.....
a) Cyclic process
b) Closed process
c) Carnot cycle
d) Reversible cycle.

18. The work function (A) is defined as......
a) A = E - TS
b) A = E + TS
c) A = TS - E
d) None of these.

19. When water is cooled to ice, its entropy......
a) Increases
b) Decreases
c) Becomes zero
d) Remain same.

20. It is impossible to transfer heat from a body at a lower temperature to one at higher temperature is
a) Third law of thermo dynamics
b) First law of thermodynamics
c) Second law of thermo dynamics
d) None of these.