Question

Which of the following is not an endothermic process?

• A. Fusion
• B. Vaporization
• C. Temperature
• D. Insoluble heavy impurities

Answer 1

The correct option is D

Insoluble heavy impurities

Explanation for correct option:

D. Insoluble heavy impurities

Exothermic process:

• The chemical process in which the heat is released is known as an Exothermic process.
• Examples are the burning of a candle and the reaction of a strong acid with water.

Endothermic process:

• The chemical process in which the heat is absorbed is known as an Endothermic process.
• Examples are melting ice cubes and Vaporisation.

Insoluble heavy impurities involve exothermic reactions, thus it is not an endothermic process.

Explanation for incorrect options:

Vaporization, fusion, and temperature are endothermic processes while insoluble heavy impurities involve exothermic reactions. Thus Options A, B, and C are incorrect.

Hence, the correct option is D i.e. Insoluble heavy impurities.