Question

In general, when metal oxides react with water, the resulting solution may be called as:

• A. Neutral
• B. Basic
• C. Acidic
• D. Coloured

Answer 1

The correct option is B

Basic

The explanation for the correct option:

B. Basic

The reaction of metallic oxide with water:

• When metallic oxides react with water, it forms a basic hydroxide salt.
• The general chemical reaction can be depicted as:

$\mathrm{Metallic}\mathrm{oxide}+\mathrm{water}\to \mathrm{Basic}\mathrm{hydroxide}\mathrm{solution}$

Example:

• When sodium oxide$\left({\mathrm{Na}}_2\mathrm{O}\right)$ reacts with water$\left({\mathrm{H}}_2\mathrm{O}\right)$, it forms a sodium hydroxide$\left(\mathrm{NaOH}\right)$ solution which is alkaline in nature.
• The chemical reaction can be depicted as:

${\mathrm{Na}}_2\mathrm{O}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2\mathrm{NaOH}\left(\mathrm{aq}\right)$

The explanation for incorrect options:

When metal oxides react with water, the resulting solution may be called basic. Thus options A, C, and D are incorrect.

Hence, the correct option is B i.e. Basic.