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 given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Question # 2

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

Question # 3

In an ideal gas, the molecules have:

Question # 4

Brownian motion increases due to

Question # 5

In a heat engine, heat is supplied by the

Question # 6

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

Question # 7

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

Question # 8

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

Question # 9

Absolute temperature can be calculated by

Question # 10

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

Question # 11

The ideal gas law is

Question # 12

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

Question # 13

According to kinetic theory of gases, molecules of a gas behave like

Question # 14

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

Question # 15

We cannot utilize the heat contents of oceans and atmosphere because

Question # 16

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 17

Sadi carnot described an ideal heat engine in

Question # 18

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

Question # 19

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

Question # 20

When two objects come to common temperature, the body is said to be in:

Question # 21

A reversible cycle is the one in which

Question # 22

In an adiabatic process the work is done at the expense of the

Question # 23

The absolute temperature of the tripple point of water is

Question # 24

Which of the following is a state variable

Question # 25

In the theory of dimensional analysis, heat may be properly represented by:

Question # 26

The efficiency of diesel engine is

Question # 27

Which of the following does not have the same units:

Question # 28

A process in which no heat enters or leaves the system is called

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 The heat required to raise the temperature of one mole of the substance through 1 K is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. all of them
2 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
3 Which of the following does not have the same units:
A. Work
B. Heat
C. Kinetic energy
D. Power
4 The state in which ice, water and vapour coexists in equilibrium is called
A. zero degree celsius
B. zero degree fahrenheit
C. absolute zero
D. 373 K
5 In the formula P = N0KT, N0denotes:
A. Number of molecules per unit per volume
B. Number of moles
C. Number of molecules
D. None of these
6 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
7 The curve representing an adiabatic process is called
A. isotherm
B. adiabat
C. adiable
D. none of them
8 Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:
A. Newton's second law
B. Pascal's law
C. Carnot theorem
D. Second law of thermodynamics
9 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
10 The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to
A. 0°C
B. 10°C
C. 17°C
D. 20°C

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