Chapter 11 - Heat and Thermodynamics - 1

Chapter 11 - Heat and Thermodynamics - 1

1. The value of Boltzman constants K is:-

a) 1.38 x 10^-23 Jmol^-1
b) 1.38 x 10^-23 JK^-1
c) 1.38 x 10^-23 JoC^-1
d) 1.38 x 10^-20 JK^-1

2. What is the average translational K.E of molecules in a gas at temperature 270C?

a) 6.52 x 10^-12 Nm
b) 6.51 x 10^-12 J
c) 6.21 x 10^-12 J
d) 6.21 x 10^-10 J

3. Efficiency of carnot engine depends on the:-

a) Nature of working substance
b) Temperature of cold reservoirs
c) Temperature of hot and cold reservoirs.
d) Temperature of hot reservoirs

4. Pressure P is inversely proportional to volume of a gas at constant:-

a) Temperature
b) Mass
c) Volume
d) Pressure

5. All real heat engines are less efficient than carnot engine due to:-

a) Temperature of reservoirs
b) Friction
c) Temperature of cold reservoirs
d) Working substance

6. For one mole of an ideal gas, the gas equation become:-

a) PV = nRT
b) PV = 2RT
c) PV = RT
d) PV = 3RT

7. The curve representing an adiabatic process is called an:-

a) Adiabatic
b) Isotherm
c) Adiabat
d) Isothermal

8. The Second Law of Thermodynamics deals with conversion of heat into work and:-

a) Direction of Force
b) Temperature
c) Direction of Flow of Heat
d) Direction of Pressure

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