Question

A certain quantity of current on passing through electrolytic baths containing AgNO₃, FeSO₄ and CrCl₃ in series, and 'x' moles of chromium metal is deposited. The ratio of moles of Ag and Fe is deposited in the ratio of

(1) x, 2x 

(2) 3x, 2x 

(3) 3x, 3x/2 

(4) x, x

Answer 1

Correct option (3) 3x, 3x/2

Explanation:

Mass of element electrodeposited is proportional to equivalent mass of element.

Equivalent masses of Ag : Fe : Cr in terms of molar mass M

Ratio of moles of electro deposited

3x : 1.5x = x