Question

Give an example of a chemical reaction for each of the following situations:

(a) A change in colour is observed.

(b) A gas is evolved.

(c) Sound is produced.

(d) Heat is produced.

(e) Change in taste is observed.​

Answer 1

Answer:

(a) Reaction between copper sulphate soludon and zinc metal. The blue colour of the copper sulphate solution fades away and a red brown metallic copper is formed.

(b) Reaction between baking soda and vinegar. Baking soda on reaction with vinegar produces carbon dioxide.

(c) Burning of crackers.