Question

Name the different modes of transfer of heat.
A. Conduction, convection and radiation.
B. Conduction, sublimation and crystallisation.
C. Conduction, calorimetry and heat transfer.
D. Vaporisation, convection, and evaporation.

Answer 1

Hint: Define every term given in the options. Evaporation and sublimation are the terms used in chemistry to denote the transfer of phase of matter.

Complete step by step answer:
To answer this question, we have to explain every term in the given options.
Conduction: It is the mode of transfer of heat energy within the body via molecular collisions.
Convection: It is the mode of transfer of heat energy by movement of gas or liquid carrying the heat energy.
Radiation: It is the mode of transfer of heat energy through the radiation emitted by the hot substance.
Sublimation: it represents the transfer of state of matter directly from solid to gas.
Crystallisation: It represents the formation of solid substance from rearrangement of the atoms or molecules.
Calorimetry: It measures the heat transfer in the chemical reactions. It is not the type of heat transfer.
Vaporisation: vaporisation of the material is the transfer of its phase from liquid to gas.
Therefore, from the above discussion, we can say, the terms conduction, convection and radiation are the modes of heat transfer.

So, the correct answer is “Option A”.

Note:
Conduction, convection and radiation are the only three modes of heat transfer that we study. The terms sublimation, calorimetry, crystallisation are the terms used in chemical reactions and are not related to the mode of transfer of heat energy. The heat is also known as thermal energy, therefore, if you are asked to name the modes of thermal energy transfer then the answer will be the same.