Question # 1

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 unit of thermodynamical scale is

Choose an answer

centigrade

fahrenheit

kelvin

none of them

The heat required to raise the temperature of one mole of the substance through 1 K is called

Choose an answer

heat capacity

specific heat capacity

molar specific heat

all of them

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

Choose an answer

decrease

remains the same

increase

any one of them

Rate of diffusion is

Choose an answer

Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

A carnot cycle consists of

Choose an answer

One step

two step

three steps

four steps

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

Choose an answer

real gas

ideal gas

any gas may be ideal or real

none of them

The relationship between Boltzmann constant k with R and N_Ais given as:

Choose an answer

k = RN_A

k =R/N_A

k = NR/N_A

None of these

No spark plug is needed in

Choose an answer

petrol engine

diesel engine

both of them

none of them

A diatomic gas molecule has

Choose an answer

translational energy

rotaional energy

vibrational energy

all of them

Melting point of ice

Choose an answer

Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

Heat travels through vacuum by

Choose an answer

Conduction

Convection

Radiation

Both A and B

At what temperature the adiabatic change is equivalent to the isothermal change?

Choose an answer

Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

On colliding in a closed container, the gas molecules

Choose an answer

Transfer momentum to the walls

Momentum becomes zero

Move in opposite directions

Perform Brownian motion

A real gas can be approximated to an ideal gas at

Choose an answer

Low density

High pressure

High density

Low temperature

The efficiency of petrol engine is usually not more than 25% to 30% because of

Choose an answer

friction

heat losses

both of them

none of them

Which of the following is not thermo dynamical function?

Choose an answer

Enthalpy

Work done

Gibb's energy

Internal energy

The product of the pressure and volume of an ideal gas is

Choose an answer

A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

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

Choose an answer

isochoric process

isothermal process

adiabatic process

none of them

More Classes

Other Links

Physics ECAT Pre Engineering 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