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

Question # 2

The relationship between Boltzmann constant k with R and NAis given as:

Question # 3

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 4

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

Question # 5

Adiabatic change occurs when the gas

Question # 6

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

Question # 7

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

Question # 8

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

Question # 9

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 # 10

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

Question # 11

The internal energy of a system does not depend upon the

Question # 12

The second law of thermodynamics is concerned with the circumstances in which

Question # 13

Boyle's law is applicable in

Question # 14

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 # 15

The example of irreversible process is

Question # 16

If the distance between two charges is doubled, the force between them will become:

Question # 17

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

Question # 18

In a heat engine, heat is supplied by the

Question # 19

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 20

Pressure exerted by a gas is

Question # 21

The internal energy of an ideal gas system is generally the

Question # 22

Which of the following is not an example of adiabatic process

Question # 23

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

Question # 24

The absolute temperature of the tripple point of water is

Question # 25

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

Question # 26

Internal energy is the sum of all the forms of

Question # 27

Maximum density of H2O is at the temperature

Question # 28

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Question # 29

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 # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 A process in which no heat enters or leaves the system is called
A. isochoric process
B. isothermal process
C. adiabatic process
D. none of them
2 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
3 Since the absolute scale is independent of the property of the working substance, hence, can be applied at
A. very high temperature
B. very low temperature
C. any one of them
D. none of them
4 The relationship between Boltzmann constant k with R and NAis given as:
A. k = RNA
B. k =R/NA
C. k = NR/NA
D. None of these
5 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
6 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
7 R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes
A. 2V
B. 3V
C. 0.5V
D. V
8 Which of the following is not an example of adiabatic process
A. the rapid escape of air from a burst type
B. the rapid expansion and compression of air through which a sound wave is passing
C. cloud formation in the atmosphere
D. none of them
9 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
10 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

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