Question

${\mathrm{CaCO}}_3+2\mathrm{HCl}\to \mathrm{\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_}$

• A. ${\mathrm{CaCl}}_2+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2(\downarrow )$
• B. ${\mathrm{CaCl}}_2+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2(\uparrow )$
• C. ${\mathrm{CaCl}}_2+{\mathrm{H}}_2+{\mathrm{CO}}_2(\uparrow )$
• D. ${\mathrm{CaCl}}_2+{\mathrm{H}}_2\mathrm{O}+\mathrm{CO}(\uparrow )$

Answer 1

The correct option is B

${\mathrm{CaCl}}_2+{\mathrm{H}}_2\mathrm{O}+{\mathrm{CO}}_2(\uparrow )$

The explanation for the correct option:

(A)

• Neutralization reaction: It is a type of reaction in which an acid reacts with a base and will result in the formation of salt, and water.
• The reaction of Calcium carbonate(${\mathrm{CaCO}}_3$) with hydrochloric acid ($\mathrm{HCl}$) is a type of neutralization reaction. In this, Calcium carbonate is a base and Hydrochloric acid is an acid.
• It results in the formation of salt Calcium chloride (${\mathrm{CaCl}}_2$), Water(${\mathrm{H}}_2\mathrm{O}$), and Carbon dioxide (${\mathrm{CO}}_2$) gas.
• The arrow for representation of releases of gas is $\uparrow$.
• Overall reaction, ${\mathrm{CaCO}}_3\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{CaCl}}_2\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2(\uparrow )$.

Therefore, the correct option is an option (A).