JEE Main 2023 — Electrochemistry Question with Solution
From: JEE Main 2023 (Online) 12th April Morning Shift
Question
For lead storage battery pick the correct statements
A. During charging of battery, on anode is converted into
B. During charging of battery, on cathode is converted into
C. Lead storage battery consists of grid of lead packed with as anode
D. Lead storage battery has solution of sulphuric acid as an electrolyte
Choose the correct answer from the options given below:
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
Let's review each statement:
A. During charging of battery, PbSO₄ on anode is converted into PbO₂.
- This statement is incorrect. During charging, PbSO₄ on the anode (lead plate) is converted to Pb, not PbO₂.
B. During charging of battery, PbSO₄ on cathode is converted into PbO₂.
- This statement is correct. During charging, PbSO₄ on the cathode (lead dioxide plate) is converted back to PbO₂.
C. Lead storage battery consists of grid of lead packed with PbO₂ as anode.
- This statement is incorrect. The anode in a lead-acid battery is made of lead (Pb), not lead dioxide (PbO₂). The cathode is made of lead dioxide (PbO₂).
D. Lead storage battery has ∼38% solution of sulphuric acid as an electrolyte.
- This statement is correct. The electrolyte in a lead-acid battery is a solution of about 35-38% sulfuric acid (H₂SO₄) in water.
Therefore, the correct answer is:
B, D only.
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This is a previous-year question from JEE Main 2023, 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.