JEE Main 2018 — Electrochemistry Question with Solution
From: JEE Main 2018 (Online) 15th April Morning Slot
Question
When an electric currents passed through acidified water, 112 mL of hydrogen gas at N.T.P. was collected at the cathode in 965 seconds. The current passed, in ampere, is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A1.0
Step-by-step explanation
Reaction at cathode :
2H+ + 2e H2
We know,
= zIt =
<
no. of moles of H2 =
mass (w) of H2 = 2
2 =
= 1 A
2H+ + 2e H2
We know,
= zIt =
<
no. of moles of H2 =
mass (w) of H2 = 2
2 =
= 1 A
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Electrochemistry chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2018, covering the Electrochemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.