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

For the working of a heat engine, there must be

Question # 2

Brownian motion increases due to

Question # 3

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 4

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

Question # 5

In case of an ideal gas, the P.E associated with its molecule is

Question # 6

The work done on the system by the environment is considered as

Question # 7

First law of thermodynamics is consequence of conservation of

Question # 8

The example of irreversible process is

Question # 9

Boyle's law is applicable in

Question # 10

Gas constant per molecule is called:

Question # 11

Electromagnetic waves emitted by hot bodies are called:

Question # 12

The curve representing an adiabatic process is called

Question # 13

The value of E0in coulomb's law is:

Question # 14

In all natural processes where heat flows from one system to another, there is always a net

Question # 15

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 16

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 17

According to the second law, which is must to produce work

Question # 18

The unit of thermodynamical scale is

Question # 19

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 20

The disorder in the system increases due to the

Question # 21

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 22

The Boltzman constant has the value

Question # 23

Rice takes longest to cook

Question # 24

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 25

No spark plug is needed in

Question # 26

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

Question # 27

A process is a reversible process, if the entropy of the system

Question # 28

The bicycle pump provides a good example of

Question # 29

According to kinetic theory of gases, molecules of a gas behave like

Question # 30

Energy gas behaves like an ideal gast at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
2 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
3 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%
4 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
5 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
6 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
7 For making cooking utensils, which of the following pairs of properties is most suited?
A. Low specific heat and high conductivity
B. Low specific heat and low conductivity
C. High specific heat and high conductivity
D. High specific heat and low conductivity
8 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
9 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
10 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these

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