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 work done on the system by the environment is considered as

Question # 2

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

Question # 3

While deriving the equation for pressure of a gas we consider the

Question # 4

When heat is removed from the system

Question # 5

Pressure of a gas at constant volume is proportion to

Question # 6

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 7

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 8

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

Question # 9

Adiabatic change occurs when the gas

Question # 10

Carnot heat engine only used

Question # 11

Sadi carnot described an ideal heat engine in

Question # 12

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 13

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

Question # 14

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

Question # 15

The pressure exerted by the gas is

Question # 16

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

Question # 17

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 # 18

Rice takes longest to cook

Question # 19

The motion of molecules in gases is:

Question # 20

Absolute temperature can be calculated by

Question # 21

In thermodynamics, internal energy is the function of

Question # 22

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

Question # 23

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

Question # 24

The rate of change of momentum of a molecule is equal to:

Question # 25

At constant volume temperature is increased. Then

Question # 26

A diatomic gas molecule has

Question # 27

The product of the pressure and volume of an ideal gas is

Question # 28

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 29

Good absorbers of heat are

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these
2 Real gases strictly obey gas law at:
A. High pressure and low temperatures
B. Low pressures and high temperatures
C. High pressures and high temperatures
D. None of these
3 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them
4 Which of the following is not an assumption of kinetic energy
A. a finite volume of gas consists of very large number of molecules
B. the gas molecules are in random motion
C. collision between the gas molecules are inelastic
D. the size of the gas molecules is much smaller than the separation between molecules
5 If water in a closed bottle is taken up to the moon and opened, the water gets
A. Freeze
B. Boiled
C. Dissociated into O2and H2
D. Evaporated
6 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
7 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
8 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
9 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
10 While deriving the equation for pressure of a gas we consider the
A. rotational motion of molecules
B. vibrational motion of molecules
C. linear motion of molecules
D. all of them

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