Question

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

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

Answer 1

The correct option is A Calcium carbonate

Carbon dioxide is released only when acids react with a metal carbonate. Here, calcium carbonate will react with nitric acid to give calcium nitrate, water and carbon dioxide gas.
Two acids cannot combine with each other to release carbon dioxide gas.
Acids react with base like calcium hydroxide to give salt and water.
Also, acids react with metals like sodium to give metal salt and hydrogen gas.