Question

The electro-chemical equivalent of a substance is numerically equal to the mass of the substance deposited if a current I flows through the electrolyte for $0.25$ seconds. The value of I is________.

• A. $1A$
• B. $2A$
• C. $3A$
• D. $4A$

Answer 1

The correct option is D $4A$

We have, $m=Zq$

or $Z=\frac{m}{q}$

For $q=1C$, $Z=m$

So, for $1$ coulomb of charge, $q=it$

or $1=i\times 0.25$ or $i=4A$