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

First law of thermodynamics is consequence of conservation of

Question # 2

For the working of a heat engine, there must be

Question # 3

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Question # 4

Real gases strictly obey gas law at:

Question # 5

Good absorbers of heat are

Question # 6

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

Question # 7

Which of the following is a state variable

Question # 8

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

Question # 9

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 # 10

A diatomic gas molecule has

Question # 11

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

Question # 12

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

Question # 13

The disorder in the system increases due to the

Question # 14

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 15

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

Question # 16

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

Question # 17

We can express the work in term 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

During the whole carnot cycle

Question # 20

Which of the following is not thermo dynamical function?

Question # 21

In the theory of dimensional analysis, heat may be properly represented by:

Question # 22

In the formula P = N0KT, N0denotes:

Question # 23

When heat is removed from the system

Question # 24

Triple point of water is

Question # 25

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

Question # 26

The ideal gas law is

Question # 27

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 # 28

Which of the following does not have the same units:

Question # 29

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 # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them
2 The unit of thermodynamical scale is
A. centigrade
B. fahrenheit
C. kelvin
D. none of them
3 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
4 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
5 On colliding in a closed container, the gas molecules
A. Transfer momentum to the walls
B. Momentum becomes zero
C. Move in opposite directions
D. Perform Brownian motion
6 First law of thermodynamics is consequence of conservation of
A. Work
B. Energy
C. Heat
D. All of these
7 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
8 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
9 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
10 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed

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