MCQ
A constant current was passed through a solution of $\mathrm{AuCl}_4^{-}$ion between gold electrodes. After a period of $10.0$ minutes, the increase in mass of cathode was $1.314 \mathrm{~g}$. The total charge passed through the solution is___________ $\times 10^{-2} \mathrm{~F}$.(Given atomic mass of $\overline{\mathrm{Au}}=\overline{197}$ )
  • $2$
  • B
    $3$
  • C
    $4$
  • D
    $5$

Answer

Correct option: A.
$2$
a
$\frac{\mathrm{W}}{\mathrm{E}}=\frac{\text { ch arge }}{1 \mathrm{~F}} $

$\frac{1.314}{\frac{197}{3}}=\frac{\mathrm{Q}}{1 \mathrm{~F}}$

$\mathrm{Q}=2 \times 10^{-2} \mathrm{~F}$

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