Electrolyte used in Ni - Cd cell

Options

A. KOH
B. `H_2SO_4`
C. `LiOH`
D. `Al_2O_3`

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Cell**: The question asks about the electrolyte used in a nickel-cadmium (Ni-Cd) cell. Recognize that this is a type of rechargeable battery.

2. **Understand the Components of the Ni-Cd Cell**: In a nickel-cadmium cell, there are two electrodes:
- The positive electrode is made of nickel oxide (specifically nickel(III) oxide hydroxide).
- The negative electrode is made of cadmium.

3. **Determine the Electrolyte**: The electrolyte in a nickel-cadmium cell is crucial for the functioning of the battery. In this case, the electrolyte used is:
- **Potassium Hydroxide (KOH)**, which is an alkaline solution.

4. **Summarize the Information**: The nickel-cadmium cell utilizes nickel oxide hydroxide as the positive electrode, cadmium as the negative electrode, and potassium hydroxide as the electrolyte.

**Final Answer**: The electrolyte used in a nickel-cadmium cell is potassium hydroxide (KOH).

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