JEE Main · 2024 · Shift-IeasyEC-026

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

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:

Options
  1. a

    B, C and E only

  2. b

    A, B, C, D and E

  3. c

    A, B, C and D only

  4. d

    B, D and E only

Correct Answera

B, C and E only

Detailed Solution

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 \ceMnO2\ce{MnO2} (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.

Answer: (a) B, C and E only\boxed{\text{Answer: (a) B, C and E only}}

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