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

Generally a temperature scale is established by

Question # 2

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

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

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

Question # 5

The absolute temperature for an ideal gas is

Question # 6

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

Question # 7

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

Question # 8

The volume of universal gas constant R is:

Question # 9

A process in which no heat enters or leaves the system is called

Question # 10

Rate of diffusion is

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about

Question # 15

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

Question # 16

Which of the following is a state variable

Question # 17

Which of the following is not thermo dynamical function?

Question # 18

In case of an ideal gas, the P.E associated with its molecule is

Question # 19

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 # 20

If the formula PV = nRT, n denotes:

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

The bicycle pump provides a good example of

Question # 25

The temperature of gas is produced by

Question # 26

One kilogram of different substances contain

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
2 The only significant motion possessed by the mono-atomic gas represented is:
A. Translatory
B. Rotatory
C. Vibratory
D. None of these
3 In a heat engine, heat is supplied by the
A. cold reservoir
B. sink
C. hot reservoir
D. none of them
4 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
5 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
6 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
7 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
8 If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy
A. 0 J
B. 2 J
C. 5 J
D. 10 J
9 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
10 The efficiency of petrol engine is usually not more than 25% to 30% because of
A. friction
B. heat losses
C. both of them
D. none of them

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