Question

Which among the given substances is formed when hydrochloric acid reacts with a metal carbonate?

• A. Oxygen
• B. Water
• C. Metal carbonate
• D. Hydrogen

Answer 1

The correct option is B

Water

Hydrochloric acid reacts with metal carbonate to form metal chloride, water and carbon dioxide. The general reaction of HCl with metal carbonate looks like this

$\text{Hydrochloric acid}+\text{Metal carbonate}\to \text{Metal chloride}+\text{Water}+\text{Carbon dioxide}$

For example, hydrochloric acid reacts calcium carbonate to form calcium chloride, water and carbon dioxide.

$2\text{HCl (aq)}+{\text{CaCO}}_3\text{(s)}\to {\text{CaCl}}_2\text{(aq)}+{\text{H}}_2\text{O(l)}+{\text{CO}}_2\text{(g)}$

So among the given options, the only one that is obtained from this reaction between hydrochloric acid and metal carbonate is water.