Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts?

If a current of $0.5 \ A$ flows through a metallic wire for $2 \ hours$,then how many coulombs would have flown through the wire (in $C$)?

Identify True $(T)$ or False $(F)$ for the following statements :
$(i)$ In electrolytes,current flows due to electron displacement.
$(ii)$ When current flows from metal,the composition of the metal changes.
$(iii)$ Due to the passage of $DC$ current through the electrolytic solution,a reaction occurs.

Which one of the following statements is correct for the electrolysis of brine solution?

$A$ reaction that takes place with the absorption of energy is

Electrolysis of molten anhydrous calcium chloride produces