Which gas is produced during the preparation of $NaOH$?

When an aqueous solution of sodium sulfate $(Na_2SO_4)$ is electrolyzed,what are the products obtained at the cathode and anode,respectively?

For the extraction of sodium from $NaCl$,an electrolytic mixture of $NaCl + Na_3AlF_6 + CaCl_2$ is used. During the extraction process,only sodium is deposited at the cathode,while $K$ and $Ca$ are not,because:

The products formed when an aqueous solution of $NaBr$ is electrolysed in a cell having inert electrodes are

Which of the following materials from $Na, Hg, S, Pt,$ and graphite are used as electrodes in electrolytic cells containing aqueous solutions?

The aqueous solution of which of the following decomposes on passing electric current?