An example of a strong electrolyte is

Options

A. Glucose
B. Urea
C. Ammonium hydroxide
D. Sodium formate

Answer

To determine an example of a strong electrolyte, we need to understand the definition and characteristics of strong electrolytes.

### Step-by-Step Solution:

1. **Definition of Strong Electrolyte**: A strong electrolyte is a substance that completely dissociates into ions when dissolved in water. This means that the degree of dissociation (α) is 100%.

**Hint**: Remember that strong electrolytes fully ionize in solution.

2. **Examples of Strong Electrolytes**: Common examples of strong electrolytes include strong acids (like hydrochloric acid, HCl), strong bases (like sodium hydroxide, NaOH), and most salts (like sodium chloride, NaCl).

**Hint**: Think of substances that are known to completely break apart into ions in water.

3. **Identifying Weak Electrolytes**: In contrast, weak electrolytes only partially dissociate into ions. Examples include weak acids (like acetic acid, CH₃COOH) and weak bases (like ammonium hydroxide, NH₄OH).

**Hint**: Weak electrolytes do not fully ionize; they exist in both ionized and non-ionized forms in solution.

4. **Conclusion**: Given the examples provided, a strong electrolyte can be identified as sodium chloride (NaCl), which is a salt and dissociates completely into Na⁺ and Cl⁻ ions when dissolved in water.

**Hint**: Salts are typically strong electrolytes, so look for common salts when identifying strong electrolytes.

### Final Answer:
An example of a strong electrolyte is sodium chloride (NaCl).