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 example of reversible process is

Question # 2

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

Question # 3

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 4

At O° K which of the following properties of a gas will be zero?

Question # 5

Efficiency of carnot engine is independent of the

Question # 6

Triple point of water is

Question # 7

The temperature scale approved in SI units is:

Question # 8

Maximum density of H2O is at the temperature

Question # 9

If the formula PV = nRT, n denotes:

Question # 10

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

Question # 11

The example of irreversible process is

Question # 12

Heat travels through vacuum by

Question # 13

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

Question # 14

The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at

Question # 15

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

Question # 16

Hotness and coldness of an object is represented in terms:

Question # 17

The internal energy of a system does not depend upon the

Question # 18

For making cooking utensils, which of the following pairs of properties is most suited?

Question # 19

The nature of thermal radiation is similar to:

Question # 20

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

Question # 21

Rate of diffusion is

Question # 22

The motion of molecules in gases is:

Question # 23

The earliest heat engine was

Question # 24

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 25

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

Question # 26

An isochoric process is one which take place at

Question # 27

A diatomic gas molecule has

Question # 28

Rice takes longest to cook

Question # 29

The absolute temperature of the tripple point of water is

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When two objects come to common temperature, the body is said to be in:
A. Static equilibrium
B. Dynamic equilibrium
C. Thermal equilibrium
D. None of these
2 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
3 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
4 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
5 The curve representing an isothermal process is called
A. adiabat
B. isotherm
C. fixed temperature
D. none of them
6 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
7 The behaviour of gases is well accounted by the kinetic theory based on
A. microscopic approach
B. macroscopic approach
C. both of them
D. none of them
8 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
9 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
10 In an ideal gas, the molecules have:
A. Kinetic energy only
B. Potential energy only
C. Both KE and PE
D. None of these

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