JEE MAIN - Chemistry (2023 - 12th April Morning Shift - No. 10)
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:
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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