The compound which on aqueous electrolysis liberates carbon dioxide at the anode and acetylene is:

Q.

The compound which on aqueous electrolysis liberates carbon dioxide at the anode and acetylene is:

Q. During electrolysis of aqueous $NaOH,4g$ of $O_2$ gas is liberated at NTP at anode, $H_2$ gas liberated at cathode is:-

Q. A compound which liberates reddish brown gas around the anode during electrolysis in its molten state is -

Q. A metal carbonate X on treatment with a mineral acid liberates a gas which when passed through aqueous solution of a substance Y gives back X. The substance Y on reaction with the gas obtained at anode during electrolysis of brine gives a compound Z which can decolorise coloured fabrics. The compounds X, Y and Z respectively are.