# Heat and Temperature MCQs with Answers

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## Heat and Temperature Online MCQs with Answers

Heat is defined as:
a) The measure of the total kinetic energy of particles in an object
b) The measure of the total potential energy of particles in an object
c) The measure of the total thermal energy of particles in an object
d) The measure of the total mechanical energy of particles in an object

c) The measure of the total thermal energy of particles in an object

Temperature is defined as:
a) The measure of the total kinetic energy of particles in an object
b) The measure of the total potential energy of particles in an object
c) The measure of the total thermal energy of particles in an object
d) The measure of the total mechanical energy of particles in an object

a) The measure of the total kinetic energy of particles in an object

The SI unit of heat is:
a) Celsius
b) Kelvin
c) Joule
d) Watt

c) Joule

The SI unit of temperature is:
a) Celsius
b) Kelvin
c) Joule
d) Watt

b) Kelvin

The transfer of heat between two objects in direct contact is called:
a) Conduction
b) Convection
d) Sublimation

a) Conduction

The transfer of heat through the movement of fluid particles is called:
a) Conduction
b) Convection
d) Sublimation

b) Convection

The transfer of heat through electromagnetic waves is called:
a) Conduction
b) Convection
d) Sublimation

The specific heat capacity of a substance is defined as:
a) The amount of heat required to raise the temperature of a unit mass of the substance by one degree Celsius
b) The amount of heat required to raise the temperature of a unit volume of the substance by one degree Celsius
c) The amount of heat required to raise the temperature of a unit mass of the substance by one degree Kelvin
d) The amount of heat required to raise the temperature of a unit volume of the substance by one degree Kelvin

a) The amount of heat required to raise the temperature of a unit mass of the substance by one degree Celsius

The specific heat capacity of water is:
a) 1 J/g°C
b) 4.18 J/g°C
c) 10 J/g°C
d) 100 J/g°C

b) 4.18 J/g°C

The process of changing a substance from a solid to a gas without passing through the liquid state is called:
a) Melting
b) Freezing
c) Evaporation
d) Sublimation

d) Sublimation

The process of changing a substance from a gas to a liquid is called:
a) Melting
b) Freezing
c) Condensation
d) Sublimation

c) Condensation

The process of changing a substance from a liquid to a solid is called:
a) Melting
b) Freezing
c) Evaporation
d) Condensation

b) Freezing

The boiling point of water at standard atmospheric pressure is:
a) 0°C
b) 100°C
c) 273°C
d) 373°C

b) 100°C

The freezing point of water at standard atmospheric pressure is:
a) 0°C
b) 100°C
c) 273°C
d) 373°C

a) 0°C

The relationship between the Celsius and Kelvin scales is:
a) Celsius = Kelvin + 273
b) Kelvin = Celsius + 273
c) Celsius = Kelvin – 273
d) Kelvin = Celsius – 273

b) Kelvin = Celsius + 273

The heat transfer equation is given by:
a) Q = mcΔT
b) Q = mL
c) Q = Pt
d) Q = ρV

a) Q = mcΔT

The law of conservation of energy states that:
a) Energy cannot be created or destroyed, only transferred or transformed
b) Energy cannot be transferred or transformed, only created or destroyed
c) Energy can be transferred, transformed, created, or destroyed
d) Energy cannot be transferred, transformed, created, or destroyed

a) Energy cannot be created or destroyed, only transferred or transformed

The term “latent heat” refers to:
a) The heat required to raise the temperature of a substance by one degree Celsius
b) The heat required to change the phase of a substance without a change in temperature
c) The heat required to evaporate a substance
d) The heat required to freeze a substance

b) The heat required to change the phase of a substance without a change in temperature

The process of transferring heat energy through the vibrations of particles is called:
a) Conduction
b) Convection
d) Sublimation

a) Conduction

The specific heat capacity of a substance depends on its:
a) Mass
b) Volume
c) Temperature
d) Chemical composition

d) Chemical composition

The temperature at which all molecular motion theoretically ceases is:
a) Absolute zero
b) Room temperature
c) Melting point
d) Boiling point

a) Absolute zero

The transfer of heat through the movement of particles in a fluid is called:
a) Conduction
b) Convection
d) Sublimation

b) Convection

The temperature of an object is a measure of its:
a) Heat content
b) Internal energy
c) Kinetic energy
d) Potential energy

c) Kinetic energy

The specific heat capacity of a substance is an intrinsic property, which means it:
a) Depends on the amount of the substance
b) Depends on the temperature of the substance
c) Depends on the shape of the substance
d) Does not depend on external factors

d) Does not depend on external factors

The process of transferring heat energy through electromagnetic waves is called:
a) Conduction
b) Convection
d) Sublimation

The heat capacity of an object depends on its:
a) Mass
b) Volume
c) Temperature
d) Chemical composition

a) Mass

The temperature of an object can be measured using a:
a) Thermometer
b) Barometer
c) Hydrometer
d) Voltmeter

a) Thermometer

The specific heat capacity of a substance is the heat required to raise the temperature of:
a) One gram of the substance by one degree Celsius
b) One kilogram of the substance by one degree Celsius
c) One gram of the substance by one degree Kelvin
d) One kilogram of the substance by one degree Kelvin

a) One gram of the substance by one degree Celsius

The heat transfer through convection occurs mainly in:
a) Solids
b) Liquids
c) Gases
d) All states of matter

c) Gases

The process of changing a substance from a solid to a liquid is called:
a) Melting
b) Freezing
c) Evaporation
d) Condensation

a) Melting

The process of changing a substance from a liquid to a gas is called:
a) Melting
b) Freezing
c) Evaporation
d) Condensation

c) Evaporation

The process of changing a substance from a gas to a solid is called:
a) Melting
b) Freezing
c) Evaporation
d) Condensation

b) Freezing

The heat required to raise the temperature of a substance by one degree Celsius is called its:
a) Heat capacity
b) Latent heat
c) Specific heat capacity
d) Heat of fusion

c) Specific heat capacity

The heat required to change the phase of a substance from a solid to a liquid is called its:
a) Heat capacity
b) Latent heat
c) Specific heat capacity
d) Heat of fusion

d) Heat of fusion

The heat required to change the phase of a substance from a liquid to a gas is called its:
a) Heat capacity
b) Latent heat
c) Specific heat capacity
d) Heat of vaporization

d) Heat of vaporization

The heat required to raise the temperature of a substance by one degree Celsius is proportional to its:
a) Mass
b) Volume
c) Density
d) Specific heat capacity

a) Mass

The process of heat transfer in a vacuum is primarily through:
a) Conduction
b) Convection
d) Sublimation

The process of heat transfer through direct contact of particles in a substance is most efficient in:
a) Solids
b) Liquids
c) Gases
d) All states of matter

a) Solids

The temperature at which a substance changes from a liquid to a gas is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

c) Boiling point

The temperature at which a substance changes from a gas to a liquid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

d) Condensation point

The temperature at which a substance changes from a solid to a liquid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

a) Melting point

The temperature at which a substance changes from a liquid to a solid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

b) Freezing point

The temperature at which a substance changes from a gas to a solid without going through the liquid state is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Sublimation point

d) Sublimation point

The temperature at which a substance changes from a solid to a gas without going through the liquid state is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Sublimation point

d) Sublimation point

The specific heat capacity of a substance is determined by its:
a) Mass
b) Volume
c) Chemical composition
d) Temperature

c) Chemical composition

The specific heat capacity of a substance is a measure of its:
a) Ability to conduct heat
b) Ability to transfer heat through convection
c) Ability to store heat energy

c) Ability to store heat energy

The heat transfer equation Q = mcΔT relates the:
a) Heat transferred, mass, and specific heat capacity of a substance
b) Heat transferred, temperature change, and specific heat capacity of a substance
c) Heat transferred, mass, and temperature change of a substance
d) Heat transferred, mass, and latent heat of a substance

c) Heat transferred, mass, and temperature change of a substance

The process of heat transfer through the emission and absorption of infrared radiation is known as:
a) Conduction
b) Convection
d) Sublimation

The heat capacity of an object depends on its:
a) Mass
b) Volume
c) Material composition
d) All of the above

d) All of the above

The rate of heat transfer through conduction depends on:
a) The temperature difference between the objects
b) The thermal conductivity of the material
c) The surface area of contact between the objects
d) All of the above

d) All of the above

The process of heat transfer in which heat energy is absorbed by the surroundings is called:
a) Exothermic
b) Endothermic
d) Isothermal

b) Endothermic

The process of heat transfer in which heat energy is released by the system is called:
a) Exothermic
b) Endothermic
d) Isothermal

a) Exothermic

The term “specific heat” refers to:
a) The amount of heat required to raise the temperature of a substance by one degree Celsius
b) The amount of heat required to change the phase of a substance without a change in temperature
c) The heat required to raise the temperature of a unit mass of a substance by one degree Celsius
d) The heat required to change the phase of a unit mass of a substance without a change in temperature

c) The heat required to raise the temperature of a unit mass of a substance by one degree Celsius

The process of heat transfer through the movement of fluid particles due to density differences is called:
a) Conduction
b) Convection
d) Sublimation

b) Convection

The temperature at which a substance changes from a gas to a liquid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

d) Condensation point

The temperature at which a substance changes from a liquid to a gas is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

c) Boiling point

The temperature at which a substance changes from a solid to a liquid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

a) Melting point

The temperature at which a substance changes from a liquid to a solid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Condensation point

b) Freezing point

The process of heat transfer through the movement of particles in a fluid is called:
a) Conduction
b) Convection
d) Sublimation

b) Convection

The specific heat capacity of water is highest compared to other common substances. This means that water:
a) Can absorb more heat without a significant temperature change
b) Can reach higher temperatures with a small amount of heat energy
c) Can transfer heat more efficiently through conduction
d) Can emit more radiation at high temperatures

a) Can absorb more heat without a significant temperature change

The process of heat transfer through the emission and absorption of electromagnetic waves is known as:
a) Conduction
b) Convection
d) Sublimation

The heat capacity of an object is directly proportional to its:
a) Mass
b) Volume
c) Temperature
d) Specific heat capacity

a) Mass

The heat transfer equation Q = mL relates the:
a) Heat transferred, mass, and specific heat capacity of a substance
b) Heat transferred, temperature change, and specific heat capacity of a substance
c) Heat transferred, mass, and latent heat of a substance
d) Heat transferred, mass, and temperature change of a substance

c) Heat transferred, mass, and latent heat of a substance

The process of heat transfer in which no heat energy is exchanged with the surroundings is called:
a) Exothermic
b) Endothermic
d) Isothermal

The temperature at which a substance changes from a gas to a solid is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Sublimation point

d) Sublimation point

The temperature at which a substance changes from a solid to a gas is called its:
a) Melting point
b) Freezing point
c) Boiling point
d) Sublimation point

d) Sublimation point

The specific heat capacity of a substance depends on its:
a) Mass
b) Volume
c) Chemical composition
d) Temperature

c) Chemical composition

The heat capacity of an object is defined as the:
a) Amount of heat required to raise the temperature of the object by one degree Celsius
b) Amount of heat required to raise the temperature of the object by one degree Kelvin
c) Ratio of heat transferred to the temperature change of the object
d) Ability of the object to conduct heat

a) Amount of heat required to raise the temperature of the object by one degree Celsius

The specific heat capacity of a substance is a measure of its ability to:
a) Conduct heat
b) Store heat energy