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 an adiabatic expansion, the temperature of the gas

Question # 2

While deriving the equation for pressure of a gas we consider the

Question # 3

We cannot utilize the heat contents of oceans and atmosphere because

Question # 4

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

Question # 5

Maximum density of H2O is at the temperature

Question # 6

The earliest heat engine was

Question # 7

For the working of a heat engine, there must be

Question # 8

When two objects are rubbed together, their internal energy

Question # 9

Which of the following is a state variable

Question # 10

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 # 11

In an ideal gas, the molecules have:

Question # 12

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

Question # 13

At O° K which of the following properties of a gas will be zero?

Question # 14

If a liquid is heated in weightlessness, the heat is transmitted through

Question # 15

The temperature of gas is produced by

Question # 16

The internal energy of an ideal gas system is generally the

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

At absolute temperature, the kinetic energy of the molecules

Question # 22

The example of irreversible process is

Question # 23

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

Question # 24

Rate of diffusion is

Question # 25

No spark plug is needed in

Question # 26

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

Question # 27

Internal energy is the sum of all the forms of

Question # 28

A heat engine is that which converts

Question # 29

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

Question # 30

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 In the theory of dimensional analysis, heat may be properly represented by:
A. ML2T-2
B. MT-2
C. ML-1T-1
D. None of these
2 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
A. Clausius statement of second law
B. Kelvin'sstatement of second law
C. Clausius statement of first law
D. Kelvin's statement of first law
3 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
4 The internal energy of a system does not depend upon the
A. initial state of the system
B. final state of the system
C. path
D. none of them
5 In an adiabatic process the work is done at the expense of the
A. energy supplied to the system
B. energy gained from the surroundings
C. internal energy
D. none of them
6 We can express the work in term of
A. directly measurable variables
B. indirectly measurable variables
C. either of them
D. both of them
7 At what temperature the adiabatic change is equivalent to the isothermal change?
A. Zero degree Celsius
B. Zero Kelvin
C. Critical temperature
D. Above critical temperature
8 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
9 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
10 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

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