Question

What will be the products when acid reacts with metals.

• A. Water and hydrogen gas
• B. Acid and hydrogen gas
• C. Salt and hydrogen gas
• D. Base and hydrogen gas

Answer 1

The correct option is C

Salt and hydrogen gas

An explanation of the correct option

Option C: When an acid reacts with a metal, the products are Salt and Hydrogen gas. This is the general word equation for the reaction:

$\mathrm{metal}+\mathrm{acid}\to \mathrm{salt}+\mathrm{hydrogen}$

For example, when Zinc(Zn) reacting with Hydrochloric acid(HCl), the Zinc chloride$\left({\mathrm{ZnCl}}_2\right)$ and Hydrogen$\left({\mathrm{H}}_2\right)$ gas is evolved.

$\underset{\left(\mathrm{Zinc}\right)}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\left(\mathrm{Hydrochloric}\mathrm{acid}\right)}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\left(\mathrm{Zinc}\mathrm{chloride}\right)}{{\mathrm{ZnCl}}_2\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{Hydrogen}\right)}{{\mathrm{H}}_2\left(\mathrm{g}\right)}$

Final Answer: The correct option is C. When an acid reacts with a metal, the products are Salt and Hydrogen gas.