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

Question # 2

A diatomic gas molecule has

Question # 3

Gas constant per molecule is called:

Question # 4

At constant temperature, if the density of the gas is increased, its pressure will:

Question # 5

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

Question # 6

The value of E0in coulomb's law is:

Question # 7

Adiabatic change occurs when the gas

Question # 8

The curve representing an adiabatic process is called

Question # 9

Electromagnetic waves emitted by hot bodies are called:

Question # 10

When heat is added into the system then change in entropy is

Question # 11

In which process the condition for the application of Boyle's law on the gas is fulfilled

Question # 12

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

Question # 13

The example of irreversible process is

Question # 14

During the whole carnot cycle

Question # 15

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

Question # 16

Heat required to raise the temperature of one mole of a gas through 1 K at constant pressure is called

Question # 17

Boyle's law is applicable in

Question # 18

When the temperature of source and sink of a heat engine become equal entropy change will be

Question # 19

The earliest heat engine was

Question # 20

While deriving equation of pressure by kinetic theory of gases, we take into account:

Question # 21

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

Question # 22

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

Question # 23

The ideal gas law is

Question # 24

In thermodynamics, internal energy is the function of

Question # 25

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

Question # 26

Good absorbers of heat are

Question # 27

If the formula PV = nRT, n denotes:

Question # 28

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

Question # 29

The heat required to raise the temperature of one mole of the substance through 1 K is called

Question # 30

The unit of thermodynamical scale is

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
2 In thermodynamics, internal energy is the function of
A. temperature
B. pressure
C. state
D. none of them
3 Good absorbers of heat are
A. Poor emitters
B. Non emitters
C. Good emitters
D. Highly polarized
4 In an adiabatic expansion, the temperature of the gas
A. increases
B. becomes zero
C. decreases
D. decreases rapidly
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 Adiabatic change occurs when the gas
A. expands
B. compressed
C. expands or compressed
D. expands or compressed rapidly
7 Absolute temperature can be calculated by
A. Means squares velocity
B. Motion of the molecule
C. Both A and B
D. None of these
8 Pressure of a gas at constant volume is proportion to
A. Total energy of gas
B. Average P.E to molecules
C. Average K.E of molecules
D. Total internal energy of gas
9 At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:
A. Double
B. Remains constant
C. Half
D. None of these
10 On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves
A. outwards
B. inwards
C. in either way
D. none of these

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