Heat & Thermodynamics MCQs with Answers

The process in which a material softens?

• A.Annealing
• B.Tempering
• C.Quenching
• D.Galvanizing

An electric kettle converts electrical energy into which form of energy?

• A.Mechanical energy
• B.Light energy
• C.Sound energy
• D.Heat energy

Past Paper MCQ

What is the factor effect of boiling water?

• A.Temperature
• B.Volume of water
• C.Air pressure
• D.Humidity

0°C is equal to ?

• A.273K
• B.32K
• C.100K
• D.0K

Which one of the following constants is not related to radiation?

• A.Stefan-Boltzmann constant
• B.Planck's constant
• C.Boltzmann's constant
• D.Wien's displacement constant

The Clausius-Clapeyron equation relates the vapor pressure of a substance to its?

• A.Density
• B.Volume
• C.Temperature
• D.Pressure

The value of absolute zero is -273°C.

• A.True
• B.False
• C.-273°C is the boiling point of water
• D.Absolute zero is 0°C

For an exothermic reaction, the sign of enthalpy will be ?

• A.Positive
• B.Negative
• C.Zero
• D.None of these

The latent heat of vaporization of water is 2,240 J. If the work done in the process of vaporization of 1g is 168 J, then the increase in internal energy is?

• A.2072 J
• B.2240 J
• C.2408 J
• D.168 J

The best absorber of radiation is a body whose surface is _?

• A.White and smooth
• B.Dull black
• C.Shiny silver
• D.Transparent