The metals that are employed in the battery industries are: A. Fe B. Mn C. Ni D. Cr E. Cd Choose the correct answer…
Electrochemistry · Class 12 · JEE Main Previous Year Question
The metals that are employed in the battery industries are:
A. Fe B. Mn C. Ni D. Cr E. Cd
Choose the correct answer from the options given below:
- a✓
B, C and E only
- b
A, B, C, D and E
- c
A, B, C and D only
- d
B, D and E only
B, C and E only
Strategy: Identify which of the listed transition metals are major components in standard industrial batteries (dry cells, rechargeable systems, etc.).
Evaluation of Metals:
- Manganese (B): Crucial as (cathode depolariser) in Leclanché and Alkaline batteries.
- Nickel (C): Key component in Ni-Cd and Ni-MH rechargeable batteries.
- Cadmium (E): Historically significant as an anode in Ni-Cd batteries.
Metals not primarily used in battery electrodes:
- Iron (A): Occasionally used in specialized redox flow cells but not a "standard" battery industry metal.
- Chromium (D): Not typically used as a primary battery metal.
Thus, B, C, and E are the correct picks.
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