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

00:00
Question # 1

The rate of change of momentum of a molecule is equal to:

Question # 2

Carnot heat engine only used

Question # 3

The pressure exerted by the gas is

Question # 4

In the formula P = N0KT, N0denotes:

Question # 5

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 6

If the formula PV = nRT, n denotes:

Question # 7

No spark plug is needed in

Question # 8

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

Question # 9

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

Question # 10

Melting point of ice

Question # 11

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 12

The motion of molecules in gases is:

Question # 13

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 14

If an amount of heat enters the system it could

Question # 15

Generally a temperature scale is established by

Question # 16

On colliding in a closed container, the gas molecules

Question # 17

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

Question # 18

The absolute temperature of the tripple point of water is

Question # 19

The behaviour of gases is well accounted by the kinetic theory based on

Question # 20

Efficiency of carnot engine is independent of the

Question # 21

Amount of heat required to raise the temperature of a body through 1 K is called its

Question # 22

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

Question # 23

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 24

A carnot cycle consists of

Question # 25

A reversible cycle is the one in which

Question # 26

In thermodynamics, internal energy is the function of

Question # 27

An isochoric process is one which take place at

Question # 28

The earliest heat engine was

Question # 29

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

Question # 30

Truth of kinetic energy is confirmed by:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
2
During the whole carnot cycle
A. Thermal equilibrium is maintained
B. mechanical equilibrium is maintained
C. both the thermal and mechanical equilibriumis maintained
D. both the thermal and mechanical equilibrium is not maintained
3 The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
A. 100 K
B. 273 K
C. 0 K
D. -273 K
4 Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
5 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
6 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
7 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
8 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
9 At absolute temperature, the kinetic energy of the molecules
A. Becomes zero
B. Becomes maximum
C. Becomes minimum
D. Remain constant
10 The bicycle pump provides a good example of
A. first law of thermodynamics
B. second law of thermodynamics
C. third law of thermodynamics
D. none of them

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