Question

Which of the following elements is extracted commercially by the electrolysis of an aqueous solution of its compound?

• A. Chlorine
• B. Sulphur
• C. Carbon
• D. None of these

Answer 1

The correct option is A Chlorine

Chlorine is manufactured by the electrolysis of $NaCl$ solution where $C{l}_2$ is evolved at the anode and $H_2$ at the cathode.
The reaction involved is :
$\text{2}NaCl\text{(aq)}+2H_{2}O\text{(aq)}\to \text{2}NaOH\text{(aq)}+C{l}_2\text{(g)}+H_2\text{(g)}$
$\bullet$ The Frasch process is a method to extract sulfur from underground deposits. It is the only industrial method of recovering sulfur from elemental deposits.
$\bullet$ Carbon is most commonly obtained from coal deposits, although it usually must be processed into a form suitable for commercial use.