Question

Assertion: In a neutralization reaction an acid combines with a base to form salt and water.

Reason: In all neutralization reactions ${\mathrm{H}}^{+}$ ions of the acid combine with ${\mathrm{OH}}^{-}$ ions of the base to form ${\mathrm{H}}_2\mathrm{O}$.

• A. If both assertion and reason are true and the reason is the correct explanation of assertion.
• B. If both assertion and reason are true but the reason is not the correct explanation of assertion.
• C. If the assertion is correct but the reason is incorrect.
• D. If the assertion is incorrect but the reason is correct.

Answer 1

The correct option is A

If both assertion and reason are true and the reason is the correct explanation of assertion.

The explanation for the assertion.

Neutralization reaction

1. In a neutralization reaction, an acid combines with a base to produce neutral salt and water$\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}\mathbf{O}\mathbf{\right)}$.

$\mathrm{Acid}+\mathrm{Base}\to \mathrm{Salt}+\mathrm{Water}$

2. For example - Hydrochloric acid$\mathbf{\left(}\mathbf{HCl}\mathbf{\right)}$ reacts with sodium hydroxide$\mathbf{\left(}\mathbf{NaOH}\mathbf{\right)}$ to form sodium chloride$\mathbf{\left(}\mathbf{NaCl}\mathbf{\right)}$ and water.

$\mathrm{HCl}\left(\mathrm{aq}\right)+\mathrm{NaOH}\left(\mathrm{aq}\right)\to \mathrm{NaCl}\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

Hence, the assertion is correct.

The explanation for the reason statement.

In the reaction above ${\mathrm{H}}^{+}$ ions from $\mathrm{HCl}$ and ${\mathrm{OH}}^{-}$ ions from $\mathrm{NaOH}$ react to form water.

${\mathrm{H}}^{+}\left(\mathrm{aq}\right)+{\mathrm{OH}}^{-}\left(\mathrm{aq}\right)\to {\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

Hence, the reason is correct and the reason correctly explains the assertion.

As assertion and reason are correct and the reason is the correct explanation for assertion.

Therefore, the correct option is (A).