The JEE Main Chemistry section requires speed and accuracy, along with a thorough understanding of the Electrolysis. This article provides a set of JEE Main PYQs on Electrolysis to help you understand the topic and improve your problem-solving skills with the help of detailed solutions by ensuring conceptual clarity, which will help you in the JEE Main 2026 preparation.
Whether you're revising the basics or testing your knowledge, these JEE Main PYQs will serve as a valuable practice resource.
The JEE Main 2026 exam is likely to continue on the same pattern as JEE Main 2025. Out of 90 questions, students can expect a fair mix from all three subjects. To get an edge, going through JEE Main previous year questions (PYQs) is one of the best strategies.
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JEE Main PYQs on Electrolysis
1.
O\(_2\) gas will be evolved as a product of electrolysis of:
(A) an aqueous solution of AgNO3 using silver electrodes.
(B) an aqueous solution of AgNO3 using platinum electrodes.
(C) a dilute solution of H2SO4 using platinum electrodes.
(D) a high concentration solution of H2SO4 using platinum electrodes.
Choose the correct answer from the options given below :(B) and (C) only
(A) and (D) only
(B) and (D) only
(A) and (C) only
2.
Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing $0.2$ Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP ($1\, atm$ and $273\, K$) is :- $2.24\, L$
- $4.48\, L$
- $6.72\, L$
- $8.96\, L$
3.
A solution of aluminium chloride is electrolyzed for 30 minutes using a current of 2A. The amount of the aluminium deposited at the cathode is _________
- 1.660 g
- 1.007 g
- 0.336 g
- 0.441 g
4.
The molar conductivity of a conductivity cell filled with $10$ moles of $20\, mL\, NaCl$ solution is $\Lambda_{ m 1}$ and that of $20$ moles another identical cell heaving $80 \, mL \, NaCl$ solution is $\Lambda_{ m 2}$, The conductivities exhibited by these two cells are same The relationship between $\Lambda_{ m 2}$ and $\Lambda_{ m 1}$ is- $\Lambda_{ m 2}=2 \Lambda_{ m 1}$
- $\Lambda_{ m 2}=\Lambda_{ m 1} / 2$
- $\Lambda_{ m 2}=\Lambda_{ m 1}$
- $\Lambda_{ m 2}=4 \Lambda_{ m 1}$
5.
The product , which is not obtained during the electrolysis of brine solution is ____ .- \(cl_2\)
- H2
- HCl
- NaOH
6.
The \(\left(\frac{\partial E}{\partial T}\right)_p\) of different types of half cells are as follows:A B C D 1 × 10-4 2 × 10-4 0.1 × 10-4 0.2 × 10-4 (Where E is the electromotive force)
Which of the above half cells would be preferred to be used as reference electrode?- A
- B
- C
- D
7.
Consider the following reaction:
\({2HSO_4^ −}_{(aq)}\xrightarrow[(2)Hydrolysis]{(1)Electrolysis} 2HSO_4^− + 2H^+ + A\)
The dihedral angle in product A in its solid phase at 110 K is :- 104°
- 111.5°
- 90.2°
- 111.0°
8.
Which one of the following statements is correct for electrolysis of brine solution?
- $OH ^{-}$is formed at cathode
- $Cl _2$ is formed at cathode
- $O _2$ is formed at cathode
- $H _2$ is formed at anode
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