Question

Which of the following statements are not correct?
A. Same quantity of electricity deposits more of iron from ferric sulphate solution than from ferrous sulphate solution
B. Electrochemical equivalent of an element can be obtained by dividing its equivalent weight by 96,500
C. 1 Faraday always liberates 1 mole of the substance at the electrode
D. A 60 watt bulb emits 60 Joules of energy per second.

Answer 1

Correct Answer - A::C
(a) is wrong because
`Fe^(2+)+2e^(-)toFe,Fe^(3+)+3e^(-)toFe`.
One faraday from `Fe^(2+)` will deposit `(1)/(2)` mol of Fe
and from `Fe^(3+)`, it will deposit `(1)/(3)` mol of Fe.
(c) is wrong because 1 F liberates one grm equivalent of the substance.