MCQ practice · SSC Chemistry Board questions · Chapter 8: Chemistry and Energy
Which is a weak electrolyte?
Think it through first, then pick an option.
- a H₂O
- b NaCl
- c CuSO₄
- d H₂SO₄
Answer and explanation
Correct answer: a H₂O
Water ionises very slightly (H₂O ⇌ H⁺ + OH⁻), so it is a weak electrolyte.
Why the other options are wrong
- b NaCl: NaCl ionises fully, so it is a strong electrolyte.
- c CuSO₄: CuSO₄ is one of the book's strong electrolytes.
- d H₂SO₄: H₂SO₄ is one of the book's strong electrolytes.
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