ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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Question # 1

The basis to define a temperature scale that is independent of material properties is provided by

Question # 2

The absolute temperature for an ideal gas is

Question # 3

The Boltzman constant has the value

Question # 4

Which of the following is not an assumption of kinetic energy

Question # 5

Average KE of a gas molecule has:

Question # 6

The nature of thermal radiation is similar to:

Question # 7

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 8

Rate of diffusion is

Question # 9

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 10

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 11

Pressure may be define as _______ per second per unit area:

Question # 12

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 13

The ideal gas law is

Question # 14

First law of thermodynamic is special case of

Question # 15

The curve representing an isothermal process is called

Question # 16

When heat is removed from the system

Question # 17

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

Question # 18

Hotness and coldness of an object is represented in terms:

Question # 19

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 20

The curve representing an adiabatic process is called

Question # 21

Gas constant per molecule is called:

Question # 22

The example of irreversible process is

Question # 23

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 24

One mole of any substance contain

Question # 25

A process in which no heat enters or leaves the system is called

Question # 26

The example of reversible process is

Question # 27

If the volume of the gas is to be increased by 4 times, then

Question # 28

If the formula PV = nRT, n denotes:

Question # 29

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 30

When the temperature of source and sink of a heat engine become equal entropy change will be

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
2 The behaviour of gases is well accounted by the kinetic theory based on
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them
3 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
4 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
5 No spark plug is needed in
A. petrol engine
B. diesel engine
C. both of them
D. none of them
6 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
7 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
8 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
9 When heat is removed from the system
A. negative
B. positive
C. zero
D. any one of them
10 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv

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