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

Question # 2

Triple point of water is

Question # 3

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 4

We can express the work in term of

Question # 5

In thermodynamics, internal energy is the function of

Question # 6

The temperature of gas is produced by

Question # 7

Brownian motion increases due to

Question # 8

Gas constant per molecule is called:

Question # 9

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 10

The unit of thermodynamical scale is

Question # 11

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 12

An isochoric process is one which take place at

Question # 13

In an ideal gas, the molecules have:

Question # 14

In the study of thermodynamics, which gas is considered as the working substance

Question # 15

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 16

The curve representing an isothermal process is called

Question # 17

If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of

Question # 18

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

Question # 19

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

Question # 20

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 21

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 22

The relationship between Boltzmann constant k with R and NAis given as:

Question # 23

The process which is carried out at constant temperature is known as

Question # 24

In an adiabatic process the work is done at the expense of the

Question # 25

The example of reversible process is

Question # 26

When heat is removed from the system

Question # 27

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 28

A diatomic gas molecule has

Question # 29

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

Question # 30

The pressure exerted by the gas is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
2 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
3 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
4 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
5 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
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 The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is
A. 70%
B. 100%
C. 35%
D. 38%
8 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
9 We cannot utilize the heat contents of oceans and atmosphere because
A. there is no reservoir at the same temperature
B. there is no reservoir at the temperature lower than any one of two
C. there is no reservoir at the temperature higher than any one of two
D. none of them
10 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
A. P=P/V<1/2mv2>
B. P=2N/V<1/2mv2>
C. P=2/3N/V<1/2mv2>
D. P=2/3N/V<mv2>

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