Question

A compound contains one $\mathrm{C}$, two $\mathrm{H}$ and three $\mathrm{O}$ atoms in its molecule.

The compound is

• A. A weak electrolyte
• B. A dibasic acid
• C. Found in carbonated water
• D. All of these

Answer 1

The correct option is D

All of these

Explanation:

• The compound formed from one $\mathrm{C}$, two $\mathrm{H}$ and three $\mathrm{O}$ atoms is Carbonic acid which is an weak acid and its formula can be given as ${\mathrm{H}}_2{\mathrm{CO}}_3$.
• It is a dibasic acid as it forms $2{\mathrm{H}}^{+}$ ions when dissolved in aqueous solution.
• The dissociation of carbonic acid can be represented as:

$\underset{(\mathrm{Carbonic}\mathrm{acid})}{{\mathrm{H}}_2{\mathrm{CO}}_3\left(\mathrm{aq}\right)}\rightleftharpoons \underset{(\mathrm{Hydrogen}\mathrm{ion})}{2{\mathrm{H}}^{+}\left(\mathrm{aq}\right)}+\underset{(\mathrm{Carbonate}\mathrm{ion})}{{\mathrm{CO}}_3^{2-}\left(\mathrm{aq}\right)}$

• Carbonic acid is also found in relatively small amounts in carbonated water.
• Therefore, all the three options are correct.

Hence, option (D) is correct.