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

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

Question # 2

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

Question # 3

Average KE of a gas molecule has:

Question # 4

The volume of universal gas constant R is:

Question # 5

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

Question # 6

Melting point of ice

Question # 7

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

Question # 8

Maximum density of H2O is at the temperature

Question # 9

Which of the following is not an example of adiabatic process

Question # 10

Good absorbers of heat are

Question # 11

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

Question # 12

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

Question # 13

Which of the following is a state variable

Question # 14

Efficiency of carnot engine is independent of the

Question # 15

Generally a temperature scale is established by

Question # 16

A reversible cycle is the one in which

Question # 17

Absolute temperature can be calculated by

Question # 18

The disorder in the system increases due to the

Question # 19

First law of thermodynamics is consequence of conservation of

Question # 20

One mole of any substance contain

Question # 21

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

Question # 22

The rate of change of momentum of a molecule is equal to:

Question # 23

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 # 24

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

Question # 25

The temperature of gas is produced by

Question # 26

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

Question # 27

The work done by the system on its environment is considered as

Question # 28

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

Question # 29

Carnot heat engine only used

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Amount of heat required to raise the temperature of a body through 1 K is called its
A. Specific heat
B. Water equivalent
C. Thermal capacity
D. Entropy
2 The absolute temperature for an ideal gas is
A. directly proportional to the rotational K.E of gas molecules
B. directly proportional to the vibrational K.E of gas molecules
C. directly proportional to the average translational K.E.of gas molecules
D. directly proportional to the P.E. of gas molecules
3 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
4 If the volume of the gas is to be increased by 4 times, then
A. Temperature and pressure must be doubled
B. At constant P the temperature must be increased by 4 times
C. At constant T the pressure must be increased by four times
D. It cannot be increased
5 At constant temperature, if the density of the gas is increased, its pressure will:
A. One kg of a substance
B. Unit volume of a substance
C. One mole of a substance
D. None of these
6 The percentage of available heat energy converted into work by a diesel engine is roughly
A. 35 %`
B. 40 %
C. 35 - 40 %
D. 25 %
7 Sadi carnot described an ideal heat engine in
A. 1820
B. 1840
C. 1860
D. 1880
8 The volume of a gas will be double of what it is at 0°C (pressure remaining constant) at
A. 546 K
B. 273 K
C. 546°C
D. 273°C
9 An irreversible heat flow from a hot to cold substances of a system, causes the disorder to
A. decrease
B. remains the same
C. increase
D. any one of them
10 A carnot cycle consists of
A. One step
B. two step
C. three steps
D. four steps

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