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 volume of universal gas constant R is:

Question # 2

Which of the following is not an example of adiabatic process

Question # 3

Heat travels through vacuum by

Question # 4

According to the second law, which is must to produce work

Question # 5

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

Question # 6

Energy gas behaves like an ideal gast at

Question # 7

A diatomic gas molecule has

Question # 8

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 # 9

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

Question # 10

Which of the following is not an assumption of kinetic energy

Question # 11

One kilogram of different substances contain

Question # 12

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

Question # 13

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Question # 14

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

Question # 15

Carnot heat engine only used

Question # 16

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

Question # 17

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

Question # 18

We cannot utilize the heat contents of oceans and atmosphere because

Question # 19

Which of the following does not have the same units:

Question # 20

Gas constant per molecule is called:

Question # 21

If an amount of heat enters the system it could

Question # 22

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 # 23

A typical four stroke petrol engine undergoes how many successive processes in each cycle

Question # 24

When two objects are rubbed together, their internal energy

Question # 25

The curve representing an isothermal process is called

Question # 26

A process is a reversible process, if the entropy of the system

Question # 27

At absolute temperature, the kinetic energy of the molecules

Question # 28

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

Question # 29

On colliding in a closed container, the gas molecules

Question # 30

Which of the following is not thermo dynamical function?

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 One mole of any substance contain
A. same number of molecules
B. different number of molecules
C. may be same or different
D. none of them
2 If a system undergoes a natural process it will go in the direction that causes the entropy of the system plus the environment to increase, this is another statement of
A. second law thermodynamics
B. first law of thermodynamics
C. third law of thermodynamics
D. none of them
3 An isochoric process is one which take place at
A. Constant internal energy
B. Constant entropy
C. Constant volume
D. Constant pressure
4 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
5 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
6 Truth of kinetic energy is confirmed by:
A. Diffusion of gases
B. Brownian motion
C. Both A and B
D. None of these
7 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
8 Average KE of a gas molecule has:
A. Direct relation with absolute temperature and inverse relation with pressure
B. Direction relation with both absolute temperature and pressure
C. Inverse relation with both absolute temperature and pressure
D. None of these
9 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
10 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them

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