Which among the given substances is formed when hydrochloric acid reacts with a metal carbonate?
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
Hydrochloric acid+Metal carbonate→Metal chloride+Water+Carbon dioxide
For example, hydrochloric acid reacts calcium carbonate to form calcium chloride, water and carbon dioxide.
So among the given options, the only one that is obtained from this reaction between hydrochloric acid and metal carbonate is water.