What volume of chlorine gas (molar mass $71 \ g \ mol^{-1}$) is evolved at $STP$ during electrolysis of fused $NaCl$ by passage of $1 \ A$ current for $965 \ s$ (in $L$)? (At $STP$,$V_m = 22.4 \ dm^3 \ mol^{-1}$)

Copper is to be electrodeposited on a nickel block of $(20 \times 5) \ cm^2$ area by using $CuSO_4$ as electrolyte. How much quantity of electricity is needed to deposit a $3.6 \ \mu m$ layer of copper (in $C$)? [Atomic weight of $Cu = 63.5 \ g \ mol^{-1}$,Density of $Cu = 8.9 \ g/cm^3$]

$A$ silver cup is plated with silver by passing $965 \ C$ of electricity. The amount of silver deposited is ............. $g$.

Calculate the mass of a divalent metal produced at the cathode by passing $5 \ A$ current through its salt solution for $100 \ minutes$. (Molar mass of metal $= x \ g/mol$)

When $1 \ F$ of electricity is passed through acidulated water,the volume of $O_2$ evolved at $STP$ is ............. $dm^{3}$.

Electrolysis of $600 \ mL$ aqueous solution of $NaCl$ for $5 \ min$ changes the $pH$ of the solution to $12$. The current in Amperes used for the given electrolysis is $...........$. $(Nearest \ integer)$.