A solution has pH 7 and conducts electricity. Which solution could it be?
Answer and explanation
Correct answer: Aqueous sodium chloride solution
A pH of 7 indicates a neutral solution, but neutrality does not mean that no ions are present. Sodium chloride dissociates in water into Na⁺ and Cl⁻ ions, allowing the solution to conduct electricity while remaining approximately neutral. Sugar and alcohol generally dissolve as molecules and do not provide many mobile ions. Pure distilled water has extremely weak conductivity, so option A is the best answer.
Frequently asked questions
What is the correct answer to this question?
Aqueous sodium chloride solution
Why is this the correct answer?
A pH of 7 indicates a neutral solution, but neutrality does not mean that no ions are present. Sodium chloride dissociates in water into Na⁺ and Cl⁻ ions, allowing the solution to conduct electricity while remaining approximately neutral. Sugar and alcohol generally dissolve as molecules and do not provide many mobile ions. Pure distilled water has extremely weak conductivity, so option A is the best answer.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
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