Question # 1

A process is a reversible process, if the entropy of the system

Choose an answer

increases

decreases

remains constant

none of them

The motion of molecules in gases is:

Choose an answer

Orderly

Random

Circular

All of these

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

Choose an answer

0 J

2 J

5 J

10 J

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

Choose an answer

Pressure

Work

Density

Force

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

Choose an answer

546 K

273 K

546°C

273°C

One mole of any substance contain

Choose an answer

same number of molecules

different number of molecules

may be same or different

none of them

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

Choose an answer

Newton's second law

Pascal's law

Carnot theorem

Second law of thermodynamics

The bicycle pump provides a good example of

Choose an answer

first law of thermodynamics

second law of thermodynamics

third law of thermodynamics

none of them

For the working of a heat engine, there must be

Choose an answer

a source of heat at high temperature

a sink at low temperature

both of them

none of them

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

Choose an answer

P=P/V<1/2mv²>

P=2N/V<1/2mv²>

P=2/3N/V<1/2mv²>

P=2/3N/V<mv²>

If an amount of heat enters the system it could

Choose an answer

decrease the internal energy

not change the internal energy

increase the internal energy

none of them

Heat travels through vacuum by

Choose an answer

Conduction

Convection

Radiation

Both A and B

The internal energy of a system does not depend upon the

Choose an answer

initial state of the system

final state of the system

path

none of them

The ideal gas law is

Choose an answer

P = nRT

V = nRT

PV =RT

PV =nRT

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

Choose an answer

microscopic approach

macroscopic approach

both of them

none of them

No spark plug is needed in

Choose an answer

petrol engine

diesel engine

both of them

none of them

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

Choose an answer

Specific heat

Water equivalent

Thermal capacity

Entropy

Hotness and coldness of an object is represented in terms:

Choose an answer

Heat

Temperature

Chemical energy

None of these

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

Choose an answer

One kg of a substance

Unit volume of a substance

One mole of a substance

None of these

More Classes

Other Links

ECAT Physics Chapter 11 Heat & Thermodynamics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer