Question:
Observe the following statements about dry cell:
It is a primary battery.
Zinc vessel acts as cathode.
A paste of moist \( \text{NH}_4\text{Cl}, \text{MnO}_2 \), and \( \text{ZnCl}_2 \) is present between two electrodes.
The potential of this cell is 1.5 V.
Observe the following statements about dry cell:
It is a primary battery.
Zinc vessel acts as cathode.
A paste of moist \( \text{NH}_4\text{Cl}, \text{MnO}_2 \), and \( \text{ZnCl}_2 \) is present between two electrodes.
The potential of this cell is 1.5 V.
It is a primary battery.
Zinc vessel acts as cathode.
A paste of moist \( \text{NH}_4\text{Cl}, \text{MnO}_2 \), and \( \text{ZnCl}_2 \) is present between two electrodes.
The potential of this cell is 1.5 V.
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In a dry cell, Zinc acts as the anode (not cathode) and graphite (carbon) rod acts as the cathode. MnO\textsubscript{2} acts as the depolarizer.
Updated On: Jun 6, 2025
- I, II, III, IV
- I, II, III only
- I, III, IV only
- II, III, IV only
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The Correct Option is C
Solution and Explanation
Step 1: Understand the components of a dry cell
- Primary battery: Correct. A dry cell is a non-rechargeable (primary) battery.
- Zinc vessel acts as cathode: Incorrect. Zinc acts as the anode (oxidation takes place here).
- Electrolyte paste: Correct. Contains moist \( \text{NH}_4\text{Cl} \), \( \text{MnO}_2 \), and \( \text{ZnCl}_2 \).
- Potential: Correct. Standard dry cell potential is approximately 1.5 V.
Step 2: Evaluate the options
- Statement II is incorrect.
- All other statements (I, III, IV) are correct.
Final Answer:
I, III, IV only
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