QJEEM23Ch072b: JEE Main 2023 Chemistry - Class 12 JEEM23Ch072b Solution: For lead storage battery pick the correct statements A. During…

Question

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For lead storage battery pick the correct statements

A. During charging of battery, $\mathrm{PbSO}_{4}$ on anode is converted into $\mathrm{PbO}_{2}$

B. During charging of battery, $\mathrm{PbSO}_{4}$ on cathode is converted into $\mathrm{PbO}_{2}$

C. Lead storage battery consists of grid of lead packed with $\mathrm{PbO}_{2}$ as anode

D. Lead storage battery has $\sim 38 \%$ solution of sulphuric acid as an electrolyte

Choose the correct answer from the options given below:

Accepted Answer

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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