Question

One faraday of electricity is passed separately through one litre of one molar aqueous solution of

I) AgNO${}_3$, ii) SnCl${}_4$ and iii) CuSO${}_4$.The number of moles of ag, Sn, and Cu deposited at cathode are respectively :

• A. 1.0, 0.25, 0.5
• B. 1.0, 0.5, 0.25
• C. 0.5, 1.0, 0.25
• D. 0.25, 0.5, 1.0

Answer 1

Answer: (A)

1.0, 0.25, 0.5

1 faraday electricity is equal to 1 mole of electric
$A{g}^{+}+e^{-}\to Ag$
$C{u}^{2t}+2e^{-}\to Cu$
$S{u}^{4t}4e^{-}\to Su$
$\therefore$ moles of Ag, Su and Cu
for 1 mole of electron respectively are :-
$1,\frac{1}{4}and0.5$