Question

2. Which of the following statements is correct? *

i)Ammonium chloride gives a strong pungent smell on reaction with sodium hydroxide.

ii) Dilute hydrochloric acid on heating with iron sulphide gives rotten egg smell.

iii) No chemical change takes place without the involvement of energy.

iv) All of these​

Answer 1

Explanation:

Dilute hydrochloric acid on heating with iron sulphide gives rotten egg smell