Heat & Thermodynamics MCQs with Answers

Convection occurs only in?

• A.Solids
• B.Liquids and gases
• C.Solids and liquids
• D.All states of matter

The vapour pressure of a liquid increases with the _?

• A.Increase of temperature
• B.Decrease of temperature
• C.Increase of atmospheric pressure
• D.Decrease of surface area

Heat is a form of energy associated with ?

• A.Molecular Motion
• B.Chemical Bonding
• C.Nuclear Fusion
• D.Gravitational Pull

Which metal is used in radiators, AC units, and heating systems due to its thermal conductivity?

• A.Aluminum
• B.Copper
• C.Iron
• D.Silver

Decrease of the size (length, area and volume) of a body due to change in temperature is called?

• A.Thermal Expansion
• B.Thermal Contraction
• C.Thermal Conduction
• D.Thermal Radiation

A container is divided into two equal portions. One portion contains an ideal gas at pressure P and temperature T while the other portion is a perfect vacuum. If a hole is opened between the two portions, what happens to the internal energy of the gas?

• A.It increases
• B.It decreases
• C.There will be no change in internal energy
• D.It first increases then decreases

In railway tracks, a small gap is left between the rails to:

• A.Prevent theft of rails
• B.Reduce the cost of construction
• C.Allow for the expansion during heat
• D.Make the track more flexible for trains to move faster

In which mode does heat transfer take place in liquids and gases?

• A.Conduction
• B.Convection
• C.Radiation
• D.None of these

Past Paper MCQ

What factor does the boiling point of water depend upon?

• A.Humidity
• B.Volume of water
• C.Shape of the container
• D.Atmospheric pressure

A vacuum flask is a type of flask that aims to stop _?

• A.Conduction
• B.Convection
• C.Radiation
• D.All of these