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

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

Question # 2

Adiabatic change occurs when the gas

Question # 3

The volume of universal gas constant R is:

Question # 4

In a heat engine, heat is supplied by the

Question # 5

The temperature of gas is produced by

Question # 6

The percentage of available heat energy converted into work by a petrol engine is roughly

Question # 7

The percentage of available heat energy converted into work by a diesel engine is roughly

Question # 8

If the volume of the gas is to be increased by 4 times, then

Question # 9

Which of the following is not an assumption of kinetic energy

Question # 10

Energy gas behaves like an ideal gast at

Question # 11

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

Question # 12

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Question # 13

The pressure exerted by the gas is

Question # 14

Which of the following is a state variable

Question # 15

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

Question # 16

Generally a temperature scale is established by

Question # 17

The curve representing an isothermal process is called

Question # 18

Which quantity is important in stating the entropy of the system

Question # 19

Absolute zero is considered as that temperature at which:

Question # 20

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

Question # 21

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

Question # 22

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 # 23

Boyle's law is applicable in

Question # 24

During the whole carnot cycle

Question # 25

A reversible cycle is the one in which

Question # 26

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

Question # 27

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

Question # 28

Rate of diffusion is

Question # 29

The Boltzman constant has the value

Question # 30

The absolute temperature of the tripple point of water is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
2 Pressure may be define as _______ per second per unit area:
A. Change in force
B. Change in momentum
C. Change in energy
D. Work done
3 The motion of molecules in gases is:
A. Orderly
B. Random
C. Circular
D. All of these
4 In the reverse process, the working substance passes through the same stages as in the direct process and
A. thermal effects at each stage are exactly reversed
B. mechanical effects at each stage are exactly reversed
C. thermal and mechanical effects at each stage remain the same
D. thermal and mechanical effects at each stage are exactly reversed
5 Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called
A. heat capacity
B. specific heat capacity
C. specific heat at constant volume
D. specific heat at constant pressure
6 The second law of thermodynamics is concerned with the circumstances in which
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
7 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
8 The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :
A. 1.7 x 103J
B. 10.2 x 103J
C. 3..4 x 103J
D. 6.8 x 103J
9 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
10 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4

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