Question

According to Faraday’s first law of electrolysis, the amount of any substance deposited at the electrode is directly proportional to the quantity of ______________

a) Voltage drop

b) Resistance

c) Electricity passed

d) Tolerance

Answer 1

Answer : c) Electricity passed

Explanation :

According to Faraday’s law of electrolysis, the amount of any substance deposited at the electrode is directly proportional to the quantity of electricity passed.

Mathematically it is given by:

m = (Q / F) * (M / Z)

where,

m = Mass liberated at an electrode in grams

Q = Total electric charge passed through the substance in Coulombs

F = Faraday constant

M = Molar mass of the substance in gm/mole

Z = Valency number of ions of the substance

For Faraday’s first law, M, F, and z are constants, so that the larger the value of Q the larger m will be.

c) Electricity passed