Question

1. The formula of the chloride of metal is ${\mathrm{MCl}}_2.$

What will be the formula of its sulphate?

2. Give the significance of the formula ${\mathrm{CO}}_2.$

Answer 1

1. Valency of M is 2.
Formula of its sulphate = $MS{O}_4$

2.
(i) It represents the compound carbon dioxide.
(ii) It says that carbon dioxide contains two elements: carbon and oxygen.
(iii) It says that one molecule of carbon dioxide contains one atom of carbon and 2 atoms of oxygen.