Lead Storage Battery
In a lead storage battery during discharge, the electrolyte density:
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During discharge of a lead storage battery, both electrodes are converted to:
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About This Question
- Subject
- chemistry
- Chapter
- p-block elements
- Topic
- lead storage battery
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Decreases
A Lead Storage Battery acts as a galvanic cell during discharge.
- Reaction: Pb(s)+PbO2(s)+2H2SO4(aq)→2PbSO4(s)+2H2O(l)
- Analysis: Notice that Sulfuric Acid (H2SO4) is being consumed from the electrolyte while Water is being produced.
- Because the dense acid is replaced by less dense water, the density (specific gravity) of the electrolyte solution decreases. This is why measuring the density of the acid is used to check the state of charge in these batteries.
This easy difficulty chemistry question is from the chapter p-block elements, covering the topic of lead storage battery. It appeared in the 2025 exam.
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