1.

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

Answer»

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



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