Question

Which of the following is not an example of acid neutralizing reaction?

• A. $MgOH+2HCl$ $\to$ $MgC{l}_2+H_{2}O$
• B. $HCl+NaOH$$\to$ $NaCl+H_{2}O$
• C. $CaC{O}_3+2HCl\to CaC{l}_2+2H_{2}O+C{O}_2$
• D. $2HN{O}_3+Ca(OH{)}_2\to Ca(N{O}_3{)}_2+2H_{2}O$

Answer 1

The correct option is C $CaC{O}_3+2HCl\to CaC{l}_2+2H_{2}O+C{O}_2$

In case of neutralizing reactions.
Acid + Base $\to$ Salt + Water.
Example:
$MgOH+2HCl$ $\to$ $MgC{l}_2+H_{2}O$
$HCl+NaOH$$\to$ $NaCl+H_{2}O$
$2HN{O}_3+Ca(OH{)}_2\to Ca(N{O}_3{)}_2+2H_{2}O$

But reaction between calcium carbonate and hydrochloric acid is a double decomposition reaction.