Which of the following is a weak electrolyte ?

Options

A. HCl
B. Nitric acid
C. Oxalic acid
D. Sulphuric acid

Explanation

To determine which of the given substances is a weak electrolyte, we can follow these steps:

### Step-by-Step Solution:

1. **Define Weak Electrolyte**: A weak electrolyte is a substance that partially dissociates into ions when dissolved in water (aqueous solution). This means that not all of the molecules break apart into ions.

2. **Identify the Substances**: List the substances provided in the question. For this example, let's assume the options are:
- HCl (Hydrochloric acid)
- HNO3 (Nitric acid)
- H2SO4 (Sulfuric acid)
- H2C2O4 (Oxalic acid)

3. **Classify Each Substance**:
- **HCl**: Strong electrolyte (dissociates completely).
- **HNO3**: Strong electrolyte (dissociates completely).
- **H2SO4**: Strong electrolyte (dissociates completely).
- **H2C2O4**: Weak electrolyte (dissociates partially).

4. **Conclusion**: Among the substances listed, H2C2O4 (Oxalic acid) is the weak electrolyte because it does not fully dissociate into ions in solution.

### Final Answer:
The weak electrolyte among the given options is **H2C2O4 (Oxalic acid)**.

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