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 only significant motion possessed by the mono-atomic gas represented is:

Question # 2

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 3

The bicycle pump provides a good example of

Question # 4

The example of irreversible process is

Question # 5

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 # 6

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 # 7

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

Question # 8

Electromagnetic waves emitted by hot bodies are called:

Question # 9

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

Question # 10

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 11

The absolute temperature of the tripple point of water is

Question # 12

In thermodynamics, internal energy is the function of

Question # 13

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

Question # 14

Which quantity is important in stating the entropy of the system

Question # 15

The pressure exerted by the gas is

Question # 16

No spark plug is needed in

Question # 17

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

Question # 18

Rice takes longest to cook

Question # 19

A heat engine is that which converts

Question # 20

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

Question # 21

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 22

We cannot utilize the heat contents of oceans and atmosphere because

Question # 23

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

Question # 24

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

Question # 25

If the distance between two charges is doubled, the force between them will become:

Question # 26

At constant volume temperature is increased. Then

Question # 27

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 28

A succession of events which bring the system back to its initial condition is called

Question # 29

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

Question # 30

The state in which ice, water and vapour coexists in equilibrium is called

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If the formula PV = nRT, n denotes:
A. Number of molecules per unit volume
B. Number of moles
C. Number of molecules
D. None of these
2 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
3 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
4 The disorder in the system increases due to the
A. removal of heat
B. addition of heat
C. removal or addition of heat
D. none of them
5 The absolute temperature of the tripple point of water is
A. 100°C
B. 4°C
C. 373 K
D. 273.16 K
6 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
7 Energy gas behaves like an ideal gast at
A. High temperature and low pressure
B. Low temperature and high pressure
C. Both A and B
D. None
8 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
9 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
10 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B

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