Which of the following does not involve a chemical reaction?
(a) digestion of food in our body
(b) process of respiration
(c) burning of candle wax when heated
(d) melting of candle wax on heating

Academic Chemistry NCERT Class 10

Correct Answer: (d) melting of candle wax on heating.

Explanation: On heating, wax changes only its physical state (solid to liquid) but not its properties. Hence, it is a physical change.

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Updated on: 10-Oct-2022

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