Question

Following are the processes that produce $H_2$ gas. Identify the other products.

• A. Zinc ions
• B. Caustic soda
• C. Carbon monoxide
• D. Carbon dioxide

Answer 1

Zinc metal and hydrochloric acid react to produce zinc ions, hydrogen gas and chloride ions.

Hydrogen gas is evolved as a by product of brine electrolysis which produces caustic soda.

The process of conversion of coal into a mixture of carbon monoxide and water is called coal gasification.

Carbon monoxide reacts with water vapour at temperature $450K-550K$ in the presence of an oxide of iron to form carbon dioxide and hydrogen gas. The above reaction is called water gas shift reaction.