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 volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 2

One mole of any substance contain

Question # 3

At constant volume temperature is increased. Then

Question # 4

The disorder in the system increases due to the

Question # 5

Adiabatic change occurs when the gas

Question # 6

The percentage of available heat energy converted into work by a diesel engine is roughly

Question # 7

The example of irreversible process is

Question # 8

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

Question # 9

The efficiency of diesel engine is

Question # 10

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 11

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 12

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 13

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

Question # 14

A reversible cycle is the one in which

Question # 15

Sadi carnot described an ideal heat engine in

Question # 16

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 # 17

When heat is added into the system then change in entropy is

Question # 18

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

Question # 19

The internal energy of a system does not depend upon the

Question # 20

Absolute temperature can be calculated by

Question # 21

A carnot cycle consists of

Question # 22

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 23

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

Question # 24

Which of the following is not an assumption of kinetic energy

Question # 25

During the whole carnot cycle

Question # 26

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

Question # 27

The volume of universal gas constant R is:

Question # 28

We cannot utilize the heat contents of oceans and atmosphere because

Question # 29

Absolute zero is considered as that temperature at which:

Question # 30

An isochoric process is one which take place at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
2 The example of reversible process is
A. an explosion
B. changes occur suddenly
C. slow compression of a gas
D. all of them
3 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
A. -20°C
B. 6.67°C
C. 5°C
D. 0°C
4 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
5 A succession of events which bring the system back to its initial condition is called
A. reversible process
B. irreversible process
C. a cycle
D. none of them
6 Which of the following is a state variable
A. entropy
B. pressure
C. volume
D. all of them
7
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
8 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
9 Which of the following is not an example of adiabatic process
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them
10 A real gas can be approximated to an ideal gas at
A. Low density
B. High pressure
C. High density
D. Low temperature

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