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:
An electrolyte is a substance that dissociates into ions when dissolved in water, allowing the solution to conduct electricity. A "strong" electrolyte is one that dissociates almost completely ($100\%$) into ions.

Step 2: Detailed Explanation:

• Sodium chloride ($NaCl$): Is an ionic salt. In water, it breaks down completely into $Na^+$ and $Cl^-$ ions. Hence, it is a strong electrolyte.
• Acetic acid ($CH_3COOH$): Is a weak acid. It only partially ionizes in water, making it a weak electrolyte.
• Glucose and Urea: Are covalent molecular compounds. They dissolve in water but do not form ions; therefore, they are non-electrolytes.

Step 3: Final Answer:
Sodium chloride solution is the strong electrolyte.