Question

Identify X in the below equation.

$CaC{O}_3+HCl\to CaC{l}_2+X+H_{2}O$

• A. $O_2$
• B. $C{O}_2$
• C. $C{l}_2$
• D. $H_2$

Answer 1

The correct option is B $C{O}_2$

• A metal carbonate always react with an acid to give its corresponding metal salt along with carbon dioxide and water.
• In the given equation, calcium carbonate is a metal carbonate which on reaction with hydrochloric acid gives its corresponding salt along with carbon dioxide and water.

${\mathrm{CaCO}}_3\left(s\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{CaCl}}_2\left(aq\right)+{\mathrm{CO}}_2\left(g\right)+H_{2}O\left(l\right)$