Question

Nitric acid reacts with "X" and release carbon dioxide gas. Identify X from the given options.

• A. Sodium
• B. Calcium hydroxide
• C. Calcium carbonate
• D. Hydrochloric acid

Answer 1

The correct option is C Calcium carbonate

Carbon dioxide is released only when acids react with metal carbonates or metal bicarbonates. Here, calcium carbonate (${\text{CaCO}}_3$) will react with nitric acid (${\text{HNO}}_3$) to give calcium nitrate (${\text{Ca(NO)}}_3$) , water (${\text{H}}_2\text{O}$) and carbon dioxide gas (${\text{CO}}_2$). The reaction involved is given below:

${\text{CaCO}}_3\text{(s)}+{\text{2HNO}}_3\text{(aq)}\to {\text{Ca(NO}}_3{)}_2\text{(aq)}+{\text{H}}_2\text{O}\text{(l)}+{\text{CO}}_2\text{(g)}$

Two acids cannot combine with each other to release carbon dioxide gas. Acids react with base like calcium hydroxide (${\text{Ca(OH)}}_2$) to give salt and water. Also, acids react with metals like sodium ($\text{Na}$) to give metal salt and hydrogen gas.