Question # 1

If heat is added to a system, then its entropy will.

Choose an answer

Increases and positive

Decrease and positive

Increases but negative

Decreases but negative

A finite volume of gas consists of

Choose an answer

Small no. of molecules

Large no. of molecule

Average no. of molecule

None of these

Entropy of measure of.

Choose an answer

Internal energy of system

Order of system

Disorder of system

Potential energy of system

Which is the process in which temperature of the system remains constant.

Choose an answer

Adiabatic process

Isochoric process

Isothermal process

Isobaric process

A Carnot engine has an efficiency of 50% when its sink temperature is at 27 ^oC. The temperature of source.

Choose an answer

273^oC

300 ^oC

327 ^oC

373 ^oC

Which of following is irreversible process

Choose an answer

Slow compression of an elastic spring

Slow evaporation of substances in isolated vessel

Slow expansion of a gas

A chemical explosion

A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

Choose an answer

28o J

920 J

600 J

200 J

Efficiency of steam locomotive is.

Choose an answer

8%

10%

9%

7%

When hot and cold water are mixed, the entropy.

Choose an answer

Decreases

Increases

Remain constant

Zero

In thermodynamics system internal energy decrease by 100 J and 100 J of work done on the system then heat lost will be.

Choose an answer

Zero

100 J

200 J

-200 J

The difference between tow molar capacities is equal to.

Choose an answer

Plank's constant

General gas equation

Molar gas constant

Boltzmann constant

The efficiency of diesel engine is about

Choose an answer

25 % to 30%

35% to 40%

40% to 50%

50% to 60%

No of spark plugs needed in the diesel engine are.

Choose an answer

0

1

2

3

Entropy remains constant.

Choose an answer

Isothermal process

Adiabatic process

Isochoric process

Isobaric process

Mercury is used as a thermometric substance because

Choose an answer

It is opaque

Does not stick to glass

Has low specific heat

All of these

At which of the following temperature a body has maximum internal energy.

Choose an answer

-273 ^oC

0 K

273 K

-273 K

During adiabatic process, which factor remains constant.

Choose an answer

Entropy

Pressure

Momentum

Power

Average translational K.E. of molecules for an ideal gas is given as

Choose an answer

1/2 KT

KT

2/3 KT

3/2 KT

More Classes

Other Links

Physics ICS Part 1 Chapter 11 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