A weak electrolyte is one which ........

Options

A. dissociates completely
B. is feebly ionised in the solution
C. ionises completely
D. is having high electrical conductivity

Explanation

**Step-by-Step Solution:**

1. **Definition of Electrolyte**: An electrolyte is a substance that, when dissolved in water, dissociates into ions. These ions are responsible for conducting electricity in the solution.

2. **Weak Electrolyte Characteristics**: A weak electrolyte is characterized by its partial dissociation in solution. This means that when a weak electrolyte is dissolved in water, only a fraction of the total molecules break apart into ions.

3. **Example of Partial Dissociation**: For instance, if we consider a weak electrolyte represented as AB, when it is dissolved in water, it may dissociate into A⁺ and B⁻ ions. However, not all of the AB molecules will dissociate. For example, if 100 molecules of AB are present, only a small percentage (e.g., 5%) may dissociate into ions.

4. **Electrical Conductivity**: Because weak electrolytes do not completely dissociate into ions, they have a lower concentration of ions in solution compared to strong electrolytes. This results in lower electrical conductivity. In contrast, strong electrolytes fully dissociate into ions, leading to higher conductivity.

5. **Examples of Weak Electrolytes**: Common examples of weak electrolytes include acetic acid (a weak acid) and ammonium hydroxide (a weak base). These substances do not fully ionize in solution, which is a key characteristic of weak electrolytes.

6. **Conclusion**: Therefore, a weak electrolyte is one that partially dissociates into ions in solution, resulting in low electrical conductivity due to the limited number of ions present.

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