Question

Which of the following is a strong electrolyte?

• A. Glucose solution
• B. Urea solution
• C. Acetic acid
• D. Sodium chloride solution

Hint:

Strong acids (like $HCl$), strong bases (like $NaOH$), and most soluble salts are strong electrolytes. If it's a "weak" acid or base, it's a weak electrolyte!

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Electrolytes are substances that conduct electricity when dissolved in water due to the presence of ions.
Strong electrolytes dissociate almost completely into ions.
Weak electrolytes dissociate only partially.
Non-electrolytes do not dissociate into ions at all.
Step 2: Detailed Explanation:
1. Glucose and Urea: These are molecular covalent compounds. They dissolve in water as intact molecules and do not form ions. Therefore, they are non-electrolytes.
2. Acetic acid (\(CH_3COOH\)): This is a weak organic acid. It only partially ionizes in water. Thus, it is a weak electrolyte.
3. Sodium chloride (\(NaCl\)): This is an ionic salt. In aqueous solution, it dissociates completely into \(Na^+\) and \(Cl^-\) ions. Thus, it is a strong electrolyte.
Step 3: Final Answer:
Sodium chloride solution is the strong electrolyte among the choices.