Electrolysis of which of the following yields benzene?

Which of the following statements is correct regarding the electrolysis of molten $NaCl$?

An ionic compound is generally a

Electrolysis of molten anhydrous calcium chloride produces

If $0.50 \ L$ of a $0.60 \ M$ $SnSO_4$ solution is electrolyzed for a period of $30.0 \ min$ using a current of $4.60 \ A$ with inert electrodes,what is the final concentration of $Sn^{2+}$ remaining in the solution? (Atomic weight of $Sn = 119$)

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is $:$