Which of the following is an electrolyte when dissolved in water?

Prepare for the NANTeL Chemistry Certification and Engineering Fundamentals Test with multiple choice questions, detailed explanations, and key insights to boost your understanding and confidence. Ace your exam!

Multiple Choice

Which of the following is an electrolyte when dissolved in water?

Explanation:
Electrolytes are substances that dissociate into ions when dissolved in water, and those ions carry charge to make the solution conduct electricity. Sodium chloride is the classic example: it splits into Na+ and Cl− ions in water, which move freely and enable electrical conduction. The other substances—glucose, sucrose, and ethanol—do not form ions in solution; they exist as neutral molecules, so their solutions do not conduct electricity well. That’s why sodium chloride in water is the electrolyte.

Electrolytes are substances that dissociate into ions when dissolved in water, and those ions carry charge to make the solution conduct electricity. Sodium chloride is the classic example: it splits into Na+ and Cl− ions in water, which move freely and enable electrical conduction. The other substances—glucose, sucrose, and ethanol—do not form ions in solution; they exist as neutral molecules, so their solutions do not conduct electricity well. That’s why sodium chloride in water is the electrolyte.

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