Question

Select the correct alternative from the choices given.

The aqueous solution of the following compounds which contains both ions and molecule is:

• A. Sulphuric acid
• B. Hydrochloric acid
• C. Nitric acid
• D. Acetic acid

Answer 1

The correct option is D

Acetic acid

The explanation for the correct option:

(D) Acetic acid: The aqueous solution of the following compounds which contains both ions and molecules.

Weak electrolyte

• These are poor conductors of electricity and allow only small amounts of current to flow through them.
• These solutions contain ions as well as undissociated molecules

Examples: weak acids, bases, and salts derived from weak acids and weak bases, that is,

• Weak acids ${\mathrm{H}}_2{\mathrm{CO}}_3,{\mathrm{CH}}_3\mathrm{COOH},\mathrm{HCOOH}\mathrm{etc}$
• Weak bases ${\mathrm{NH}}_4\mathrm{OH},\mathrm{Mg}{\left(\mathrm{OH}\right)}_2\mathrm{etc}$
• Weak salts $\mathrm{Pb}{\left({\mathrm{NH}}_4\right)}_2,{\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2,{\mathrm{CO}}_3\mathrm{etc}$

The explanation for the incorrect option:

(A) Sulphuric acid - it is a strong electrolyte hence the aqueous solution of it contains only ions, not molecules.

(B) Hydrochloric acid - it is a strong electrolyte hence the aqueous solution of it contains only ions, not molecules.

(C) Nitric acid - it is a strong electrolyte hence the aqueous solution of it contains only ions, not molecules.

Thus, Option (D) which is Acetic acid is the correct option for the statement The aqueous solution of the following compounds contains both ions and molecules.