Question

Zinc on reaction with hydrochloric acid produces gas.

• A. nitrogen
• B. chlorine
• C. hydrogen

Answer 1

The correct option is C hydrogen

Zinc reacts rapidly with hydrochloric acid to form zinc chloride and hydrogen gas. It is a single displacement reaction where zinc metal displaces the hydrogen to form hydrogen gas and zinc chloride. The reaction involved is exothermic and hence generates large amount of heat:
$\text{Zn}\text{(s)}+\text{2HCl}\text{(aq)}\to {\text{ZnCl}}_2\text{(aq)}+{\text{H}}_2\text{(g)}$