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

Which of the following is not an example of adiabatic process

Question # 3

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

Question # 4

Which of the following is not thermo dynamical function?

Question # 5

The temperature scale approved in SI units is:

Question # 6

The process which is carried out at constant temperature is known as

Question # 7

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 8

One mole of any substance contain

Question # 9

While deriving the equation for pressure of a gas we consider the

Question # 10

The concept of entropy was introduced into the study of thermodynamics in

Question # 11

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Question # 12

Pressure may be define as _______ per second per unit area:

Question # 13

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

Question # 14

Average KE of a gas molecule has:

Question # 15

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

Question # 16

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 # 17

A diatomic gas molecule has

Question # 18

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 # 19

Pressure of a gas at constant volume is proportion to

Question # 20

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

Question # 21

The internal energy of an ideal gas system is generally the

Question # 22

The bicycle pump provides a good example of

Question # 23

Energy gas behaves like an ideal gast at

Question # 24

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

Question # 25

In an ideal gas, the molecules have:

Question # 26

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

Question # 27

Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be

Question # 28

One kilogram of different substances contain

Question # 29

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

Question # 30

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

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ECAT Chapter 11 Important MCQ's

Sr.# Question Answer
1 A heat engine is that which converts
A. mechanical energy into thermal energy
B. thermal energy into mechanical energy
C. K.E into potential energy
D. heat energy into light energy
2 If a liquid is heated in weightlessness, the heat is transmitted through
A. Conduction
B. Convection
C. Radiation
D. Neither, because the liquid cannot be heated in weightlessness
3 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
4 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
5 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
6 If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is
A. 2 : 1
B. 4 : 1
C. 1 : 4
D. 3 : 4
7 The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called
A. heat capacity
B. specific heat capacity
C. molar specific heat
D. molar specific heat at constant volume
8 The temperature of gas is produced by
A. At potential energy of its molecules
B. The kinetic energy of its molecules
C. The attractive force between its molecules
D. The repulsive force between its molecules
9 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
10 According to kinetic theory of gases, molecules of a gas behave like
A. Inelastic spheres
B. Perfectly elastic rigid sphere
C. Perfectly elastic non-rigid spheres
D. Inelastic non-rigid spheres

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