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 process which is carried out at constant temperature is known as

Question # 2

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

Question # 3

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 4

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

Question # 5

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 6

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

Question # 7

Which of the following is not an assumption of kinetic energy

Question # 8

In a heat engine, heat is supplied by the

Question # 9

Truth of kinetic energy is confirmed by:

Question # 10

The relationship between Boltzmann constant k with R and NAis given as:

Question # 11

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

Question # 12

In an ideal gas, the molecules have:

Question # 13

The efficiency of diesel engine is

Question # 14

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

Question # 15

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

Question # 16

Adiabatic change occurs when the gas

Question # 17

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

Question # 18

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

Question # 19

The bicycle pump provides a good example of

Question # 20

The ideal gas law is

Question # 21

If water in a closed bottle is taken up to the moon and opened, the water gets

Question # 22

A real gas can be approximated to an ideal gas at

Question # 23

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 # 24

Efficiency of carnot engine is independent of the

Question # 25

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

Question # 26

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

Question # 27

If the formula PV = nRT, n denotes:

Question # 28

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 29

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

Question # 30

Brownian motion increases due to

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Maximum density of H2O is at the temperature
A. 32°F
B. 39.2°F
C. 42°F
D. 4°F
2 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
A. 300°C
B. 573°C
C. 600°C
D. 743°C
3 At constant volume temperature is increased. Then
A. Collision on walls will be less
B. Number of collisions per unit time will increase
C. Collision will be in straight lines
D. Collision will not change
4 In all natural processes where heat flows from one system to another, there is always a net
A. decrease in entropy
B. increase in entropy
C. decrease or increase in entropy
D. none of them
5 Generally a temperature scale is established by
A. one fixed point
B. two fixed point
C. three fixed point
D. four fixed point
6 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
7 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
8 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
9 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
10 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them

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