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

00:00
Question # 1

Absolute zero is considered as that temperature at which:

Question # 2

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

Question # 3

The absolute temperature of the tripple point of water is

Question # 4

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

Question # 5

In an ideal gas, the molecules have:

Question # 6

In the formula P = N0KT, N0denotes:

Question # 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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

A heat engine is that which converts

Question # 12

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

Question # 13

Melting point of ice

Question # 14

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

Question # 15

In a heat engine, heat is supplied by the

Question # 16

Internal energy is the sum of all the forms of

Question # 17

The volume of universal gas constant R is:

Question # 18

Truth of kinetic energy is confirmed by:

Question # 19

For the working of a heat engine, there must be

Question # 20

If the formula PV = nRT, n denotes:

Question # 21

In thermodynamics, internal energy is the function of

Question # 22

The temperature scale approved in SI units is:

Question # 23

The pressure exerted by the gas is

Question # 24

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

Question # 25

Which of the following does not have the same units:

Question # 26

Which of the following is a state variable

Question # 27

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

Question # 28

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 29

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 # 30

Which of the following is not an assumption of kinetic energy

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
2 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these
3 If the distance between two charges is doubled, the force between them will become:
A. Double
B. Half
C. Three times
D. One fourth
4 Gas constant per molecule is called:
A. Universal gas constant
B. Stefen's constant
C. Boltzmann constant
D. Gravitation constant
5 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
6 In case of an ideal gas, the P.E associated with its molecule is
A. maximum
B. zero
C. minimum
D. not fixed
7 Which quantity is important in stating the entropy of the system
A. initial entropy
B. final entropy
C. change in entropy
D. none of them
8 The example of irreversible process is
A. slowly liquification
B. slowly evaporation
C. an explosion
D. all of them
9 Rate of diffusion is
A. Faster in solids than in liquids and gases
B. Faster in liquids than in solids and gases
C. Equal to solids, liquids and gases
D. Faster in gases than in liquids and solids
10 Generally a temperature scale is established by using certain physical properties of a material which varies
A. nonlinearly with temperature
B. linearly with temperature
C. either of them
D. none of them

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