The elctrolyte which is partially ionised in its aqueous solution is

Options

A. ethanoic acid
B. hydrochloric acid
C. ammonium chloride
D. potassium nitrate

Answer

To solve the question, "The electrolyte which is partially ionised in its aqueous solution is:", we can follow these steps:

### Step 1: Understand the Types of Electrolytes
Electrolytes are substances that dissociate into ions when dissolved in water. They can be classified into two main categories:
- **Strong Electrolytes**: These completely dissociate into ions in solution (e.g., strong acids, strong bases, and soluble salts).
- **Weak Electrolytes**: These only partially dissociate into ions in solution (e.g., weak acids and weak bases).

### Step 2: Identify the Options
The question suggests that we need to identify which electrolyte is partially ionized. Common examples of weak electrolytes include:
- Acetic acid (ethanoic acid)
- Ammonium hydroxide
- Carbonic acid

### Step 3: Analyze the Given Options
In the provided context, the options mentioned include:
1. Hydrochloric acid (HCl)
2. Ammonium chloride (NH4Cl)
3. Potassium nitrate (KNO3)
4. Ethanoic acid (CH3COOH)

- **Hydrochloric acid (HCl)**: A strong acid and thus a strong electrolyte.
- **Ammonium chloride (NH4Cl)**: A salt formed from a strong acid and a weak base, it is a strong electrolyte.
- **Potassium nitrate (KNO3)**: A salt and also a strong electrolyte.
- **Ethanoic acid (CH3COOH)**: A weak acid that partially ionizes in solution.

### Step 4: Conclusion
Among the options, **ethanoic acid (CH3COOH)** is the only substance that is a weak electrolyte and partially ionizes in its aqueous solution. Therefore, the answer to the question is:

**Answer: Ethanoic acid (CH3COOH)**

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