Question

What current is to be passed for $0.25$ sec for deposition of certain weight of metal which is equal to its electrochemical equivalent

• A. $4A$
• B. $100A$
• C. $200A$
• D. $2A$

Answer 1

The correct option is A $4A$

$Given$ $Data:$ 1) $Time$ $\left(t\right)$ = $0.25sec$

2) $Electrochemical$ $Equivalent$$\left(Z\right)$ = $1gram/coulomb$

3) $Weight$ $of$ $metal$$\left(W\right)$ = $\left(Z\right)$ =$1gram$

$By$ $Farada{y}^{\prime }s$ $First$ $Law$ $of$ $Electrolysis$ $we$ $have,$

$W$ = $Z$ $I$ $t$ ...............($1$)

$\frac{W}{Z}$ = $I$ $t$

$Substituting$ $the$ $given$ $values$ $in$ $\left(1\right)$ $we$ $get$,

$\frac{1}{1}$ =$I$ $\times 0.25$

$I$ = $4$ $amp$.

$Hence$ $the$ $correct$ $option$ $is$ ${}^{\prime }{A}^{\prime }$.