Question

Aqueous solution of borax is

• A. Neutral
• B. Acidic
• C. Alkaline
• D. Strongly acidic

Answer 1

The correct option is C

Alkaline

Explanation for correct option:

C. Alkaline

Borax:

• Borax is a powdery white substance in appearance.
• It is also known as sodium borate.
• The chemical formula of borax is ${\mathrm{Na}}_2\left[{\mathrm{B}}_4{\mathrm{O}}_5{\left(\mathrm{OH}\right)}_4\right]·8{\mathrm{H}}_2\mathrm{O}$.
• Borax is a salt of weak boric acid and a strong sodium hydroxide base.
• When borax is dissolved in water it produces hydroxyl ions $\left({\mathrm{OH}}^{-}\right)$. Thus, an aqueous solution of borax is alkaline in nature.

Explanation for incorrect options:

The aqueous solution of borax is alkaline in nature. thus options A, B and D are incorrect.

Hence, the correct option is C i.e. Alkaline.