First slide

Batteries

Question

What is I, II and electrolyte used in the above figure?

Difficult

A

I - Spongy lead
II - PbO₂
III - 50% H₂SO₄ solution
B

I - Spongy lead
II - PbO₂
III - 38% H₂SO₄ solution
C

I - PbO₂
II - Spongy lead
III - 50% H₂SO₄ solution
D

I - PbO₂
II - Spongy lead
III - 38% H₂SO₄ solution

Solution

Lead storage battery consists of spongy lead anode and a grid of lead packed with lead dioxide (PbO₂) as cathode. 38% solution of H₂SO₄ is used as an electrolyte.

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