Explanation

(b)
Laws of electrolysis were proposed by Michael Faraday in 1833.
Faraday’s first law “The mass of any substance deposited or liberated at any electrode is directly proportional to the quantity of electricity passed”.
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ i.e.,\ \ \ \ w\ \propto \ Q$
where, $w$ = mass of ions liberated in gram
$Q\$= quantity of electricity passed in coulombs.
Faraday’s second law “When the same quantity of electricity is passed through different electrolytes, the masses of different ions liberated at the electrodes are directly proportional to their chemical equivalents.”
$\ \ \ i.e.,\ \ \ \ \ \ \ \frac{w_{1}}{w_{2}} = \ \frac{E_{1}}{E_{2}}or\ \frac{Z_{1}it}{Z_{2}it} = \ \frac{E_{1}}{E_{2}}.$