Question

Under what condition will impurities form under cathode?

(a) When temperature exceeds critical temperature

(b) When pressure exceeds critical pressure

(c) When the amount of electrolyte is increased enormously

(d) When water content is increased

This question was addressed to me by my school principal while I was bunking the class.

I would like to ask this question from Characteristics of Electroplating Wastes in chapter Electroplating of Engineering Chemistry II

Answer 1

Right option is (b) When pressure exceeds critical pressure

The best explanation: Since during electroplating, the standard critical temperature and pressure are maintained. If the temperature is increased, then only the polarities of the electrode change, but if the pressure is increased, the impurities will shift from anode to cathode.