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

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 # 2

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

Question # 3

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 4

If the formula PV = nRT, n denotes:

Question # 5

Absolute zero is considered as that temperature at which:

Question # 6

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

Question # 7

The absolute temperature of the tripple point of water is

Question # 8

Which of the following does not have the same units:

Question # 9

We can express the work in term of

Question # 10

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

Question # 11

Heat travels through vacuum by

Question # 12

Energy gas behaves like an ideal gast at

Question # 13

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

Question # 14

Which of the following is not an example of adiabatic process

Question # 15

Absolute temperature can be calculated by

Question # 16

The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at

Question # 17

If the distance between two charges is doubled, the force between them will become:

Question # 18

In an adiabatic expansion, the temperature of the gas

Question # 19

Good absorbers of heat are

Question # 20

In the study of thermodynamics, which gas is considered as the working substance

Question # 21

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

Question # 22

One mole of any substance contain

Question # 23

The only significant motion possessed by the mono-atomic gas represented is:

Question # 24

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

Question # 25

The curve representing an isothermal process is called

Question # 26

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

Question # 27

Rice takes longest to cook

Question # 28

Generally a temperature scale is established by

Question # 29

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

Question # 30

The value of E0in coulomb's law is:

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Sr.# Question Answer
1 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
2 The work done on the system by the environment is considered as
A. positive
B. negative
C. zero
D. any one of them
3 The temperature scale approved in SI units is:
A. Celsius scale
B. Kelvin scale
C. Fehrenheit scale
D. None of these
4 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
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 Melting point of ice
A. Increases with increasing pressure
B. Decreases with increasing pressure
C. Is independent of pressure
D. Is proportional to pressure
7 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
8 At O° K which of the following properties of a gas will be zero?
A. Kinetic energy
B. Potential energy
C. Vibrational energy
D. Density
9 A process is a reversible process, if the entropy of the system
A. increases
B. decreases
C. remains constant
D. none of them
10 The nature of thermal radiation is similar to:
A. Ultraviolet rays
B. Light rays
C. Both of them
D. None of these

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