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 number of translation degress of freedom for a diatomic gas is

Question # 2

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

Question # 3

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

Question # 4

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 5

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

Question # 6

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

Question # 7

Internal energy is the sum of all the forms of

Question # 8

If an amount of heat enters the system it could

Question # 9

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

Question # 10

The bicycle pump provides a good example of

Question # 11

Good absorbers of heat are

Question # 12

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

Question # 13

The disorder in the system increases due to the

Question # 14

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

Question # 15

The motion of molecules in gases is:

Question # 16

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 17

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

Question # 18

Heat travels through vacuum by

Question # 19

The absolute temperature for an ideal gas is

Question # 20

First law of thermodynamic is special case of

Question # 21

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

Question # 22

Gas constant per molecule is called:

Question # 23

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

Question # 24

During the whole carnot cycle

Question # 25

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

Question # 26

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 27

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

Question # 28

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 # 29

The value of E0in coulomb's law is:

Question # 30

An isochoric process is one which take place at

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be
A. 81 K
B. 355 K
C. 627 K
D. 627°C
2 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
3 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
4 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
5 Heat travels through vacuum by
A. Conduction
B. Convection
C. Radiation
D. Both A and B
6 Triple point of water is
A. 273.16°F
B. 372.16K
C. 273.16°F
D. 273.16
7 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity
8 What temperature is the same on Celsius scale as well as on Fahrenheit scale?
A. 32°C
B. -32°C
C. -40°C
D. -212°C
9 In which process the condition for the application of Boyle's law on the gas is fulfilled
A. isochoric process
B. adiabatic process
C. isothermal process
D. none of them
10 The efficiency of diesel engine is
A. 25%
B. 25 - 30%
C. 35%
D. 35 - 40%

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