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

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

Question # 2

In all natural processes where heat flows from one system to another, there is always a net

Question # 3

The pressure exerted by the gas is

Question # 4

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 5

The product of the pressure and volume of an ideal gas is

Question # 6

Real gases strictly obey gas law at:

Question # 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

Question # 8

The efficiency of petrol engine is usually not more than 25% to 30% because of

Question # 9

Triple point of water is

Question # 10

If the formula PV = nRT, n denotes:

Question # 11

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

Question # 12

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

Question # 13

First law of thermodynamics is consequence of conservation of

Question # 14

We can express the work in term of

Question # 15

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

Question # 16

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

Question # 17

Rice takes longest to cook

Question # 18

The efficiency of diesel engine is

Question # 19

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

Question # 20

The absolute temperature for an ideal gas is

Question # 21

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 # 22

We cannot utilize the heat contents of oceans and atmosphere because

Question # 23

The state in which ice, water and vapour coexists in equilibrium is called

Question # 24

The value of E0in coulomb's law is:

Question # 25

Energy gas behaves like an ideal gast at

Question # 26

Which of the following does not have the same units:

Question # 27

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 # 28

The volume of universal gas constant R is:

Question # 29

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

Question # 30

Generally a temperature scale is established by using certain physical properties of a material which varies

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
2 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
3 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
4 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
5 In the study of thermodynamics, which gas is considered as the working substance
A. real gas
B. ideal gas
C. any gas may be ideal or real
D. none of them
6 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
7 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
8 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
9 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
10 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

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