The statement “The amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte” relates to which law?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Faraday’s first law of electrolysis
Faraday’s first law of electrolysis links the chemical change at one electrode to the quantity of electricity passed:
\( \displaystyle w=Z\,Q=Z\,I\,t \)
Here w is the mass deposited, Q the charge in coulombs (current I in amperes × time t in seconds) and Z the electrochemical equivalent. The second law, in contrast, compares different substances liberated by the same charge.
NCERT (2026-27 edition):
Quantitative Aspects of Electrolysis
