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Which of the following statements about secondary cells is correct?
AThey have no electrodes, only an electrolyte solution inside
BThey can be recharged because the chemical reaction is reversible
CThey give a current that reverses direction every cycle
DThey produce light directly without needing a bulb
Answer & Solution
Correct answer: B. They can be recharged because the chemical reaction is reversible
1. Secondary cells are storage cells.
2. Their chemical reaction is reversible.
3. So they can be recharged after each use.
4. Hence option A is correct.
_Source: Selina Concise Physics Class 9, Ch 9 Current Electricity (Mistral OCR'd PDF), section on secondary cells_
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