The amount or mass of ${\mathrm{CI}}_2$ produced when $1 \mathrm{A}$ current is passed through $\mathrm{Na} \mathrm{Cl}$solution for 30 min is

$$\begin{gathered} \text{ Amount }=\frac{1}{2}\left(\frac{1 \mathrm{mol}}{96500 \mathrm{C}}\right)(1\times 30\times 60 \mathrm{C}) \\ =\frac{1}{2}\times 0.0187\mathrm{mol} \mathrm{Mass} \\ =\frac{1}{2}\times 0.0187\times 71 \mathrm{g}=0.664 \mathrm{g} \end{gathered}$$

The amount or mass of ${\mathrm{CI}}_2$ produced when $1 \mathrm{A}$ current is passed through $\mathrm{Na} \mathrm{Cl}$solution for 30 min is 0.66 g.