Question # 1

In an ideal gas, the molecules have:

Choose an answer

Kinetic energy only

Potential energy only

Both KE and PE

None of these

First law of thermodynamics is consequence of conservation of

Choose an answer

Work

Energy

Heat

All of these

In which process the condition for the application of Boyle's law on the gas is fulfilled

Choose an answer

isochoric process

adiabatic process

isothermal process

none of them

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

Choose an answer

0°C

10°C

17°C

20°C

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

Choose an answer

Only linear motion of molecules

Only rotational motion

Only vibratory motion

All of these

In an adiabatic expansion, the temperature of the gas

Choose an answer

increases

becomes zero

decreases

decreases rapidly

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Choose an answer

300°C

573°C

600°C

743°C

A carnot cycle consists of

Choose an answer

One step

two step

three steps

four steps

The nature of thermal radiation is similar to:

Choose an answer

Ultraviolet rays

Light rays

Both of them

None of these

The volume of universal gas constant R is:

Choose an answer

8.314 J/K mole K

8314 J/K mole K

8.314 J/mole K

None of these

The efficiency of diesel engine is

Choose an answer

25%

25 - 30%

35%

35 - 40%

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Choose an answer

a reversible process

an irreversible process

any one of them

both of them

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

If water in a closed bottle is taken up to the moon and opened, the water gets

Choose an answer

Freeze

Boiled

Dissociated into O₂and H₂

Evaporated

Generally a temperature scale is established by

Choose an answer

one fixed point

two fixed point

three fixed point

four fixed point

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

Choose an answer

Double

Half

Three times

One fourth

One third

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

Choose an answer

decrease in entropy

increase in entropy

decrease or increase in entropy

none of them

Carnot heat engine only used

Choose an answer

isothermal processes

adiabatic processes

both of them

none of them

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

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