Question

What are the changes characterising the following reactions?
1. Reaction between zinc granules and hydrochloric acid
2. When magnesium burns in air​

Answer 1

Explanation:

$\huge \mathbb{1.}$

When zinc granules and hydrochloric acid react with each other, Zinc being more reactive than hydrogen displaces chlorine from hydrogen and attached itself to chlorine and form new compound zinc chloride.

Reaction is as follows:-

$Z_n + 2HCL \implies Z_nCL_2 + H_2$

$\huge \mathtt{2.}$

Magnesium when burns in air it forms protective layer of magnesium oxide which is unreactive and prevents metal from rusting and burning.

Reaction is as follows :-

$Mg + O_2 \implies MgO_2$