Question

A chemical compound which can be used to separate a mixture of carbon powder and sulphur powder successfully is

• A. carbon dioxide
• B. hydrochloric acid
• C. carbon disulphide
• D. hydrogen sulphide

Answer 1

The correct option is C

carbon disulphide

The explanation for correct option:

(c) Carbon disulphide:

1. Carbon disulphide can be used to separate a mixture of carbon powder and sulphur powder.
2. This can be done by dissolving the mixture into a carbon disulphide $\left({\mathrm{CS}}_2\right)$ solvent.
3. The sulphur will dissolve and carbon will remain as residue.
4. Evaporate the filtrate to obtain sulphur.

Explanation for incorrect options:

Since none of the two, sulphur and carbon is soluble in carbon dioxide, hydrochloric acid and hydrogen sulphide thus options (a), (b) and (d) are incorrect.

Hence, option (c) is the correct option.