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 Boltzman constant has the value

Question # 2

Maximum density of H2O is at the temperature

Question # 3

The percentage of available heat energy converted into work by a diesel engine is roughly

Question # 4

The unit of thermodynamical scale is

Question # 5

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

Question # 6

In an ideal gas, the molecules have:

Question # 7

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

Question # 8

The absolute temperature of the tripple point of water is

Question # 9

A real gas can be approximated to an ideal gas at

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Which of the following does not have the same units:

Question # 14

The absolute temperature for an ideal gas is

Question # 15

Truth of kinetic energy is confirmed by:

Question # 16

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

Question # 17

A carnot cycle consists of

Question # 18

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

Question # 19

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

Question # 20

At what temperature the adiabatic change is equivalent to the isothermal change?

Question # 21

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

Question # 22

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

Question # 23

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

Question # 24

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

Question # 25

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

Question # 26

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 # 27

One kilogram of different substances contain

Question # 28

Brownian motion increases due to

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The rate of change of momentum of a molecule is equal to:
A. Pressure
B. Work
C. Density
D. Force
4 Boyle's law is applicable in
A. Isochoric process
B. Isothermal process
C. Isobaric process
D. Isotonic process
5 Internal energy is the sum of all the forms of
A. K.E
B. P.E
C. both of them
D. none of them
6 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
7 First law of thermodynamic is special case of
A. Law of conservation of energy
B. Charle's law
C. Law of conservation of mass
D. Boyle's law
8 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
A. 1 : 2
B. 2 : 3
C. 3 : 4
D. 8 : 9
9 Absolute zero is considered as that temperature at which:
A. All liquid become gases
B. All gases become liquid
C. Water freezes
D. None of these
10 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them

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