Question

Classify the following chemical reactions as exothermic or endothermic:

(i) water is added to quick lime.

(ii) dilute sulphuric acid is added to zinc granules.

(iii) when ammonium chloride is dissolved in water in a test tube it becomes cold.

(iv) the decomposition of vegetable matter into compost.

(v) electrolysis of water.​

Answer 1

1 exothermic

2 and 3 endothermic

4 exothermic

5 endothermic

6 endothermic

hope it helps

HAPPY HOLI

Answer 2

(i) Exothermic

(ii) Exothermic

(iii) Endothermic

(iv) Exothermic

(v) Endothermic