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 efficiency of diesel engine is

Question # 2

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

Question # 3

The absolute temperature of the tripple point of water is

Question # 4

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

Question # 5

Absolute zero is considered as that temperature at which:

Question # 6

When two objects come to common temperature, the body is said to be in:

Question # 7

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 8

Triple point of water is

Question # 9

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

Question # 10

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 # 11

Adiabatic change occurs when the gas

Question # 12

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

Question # 13

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

Question # 14

Efficiency of carnot engine is independent of the

Question # 15

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

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 removed from the system

Question # 18

Hotness and coldness of an object is represented in terms:

Question # 19

On colliding in a closed container, the gas molecules

Question # 20

In an ideal gas, the molecules have:

Question # 21

The example of irreversible process is

Question # 22

The bicycle pump provides a good example of

Question # 23

If the formula PV = nRT, n denotes:

Question # 24

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

Question # 25

One kilogram of different substances contain

Question # 26

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

Question # 27

The number of translation degress of freedom for a diatomic gas is

Question # 28

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

Question # 29

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

Question # 30

Which of the following is not an example of adiabatic process

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 The earliest heat engine was
A. petrol engine
B. diesel engine
C. electric engine
D. steam engine
3 Rice takes longest to cook
A. In a submarine 100 m below the surface of the sea
B. At sea level
C. At Murree
D. At Mount Everest
4 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
5 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
6 Which of the following is not thermo dynamical function?
A. Enthalpy
B. Work done
C. Gibb's energy
D. Internal energy
7 The work done by the system on its environment is considered as
A. positive
B. negative
C. zero
D. any one of them
8 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
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
A. R/2
B. P
C. 2P
D. Depending on the relative mass of the gases
10 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres

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