MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
Which of these dissolves in water?
Think it through first, then pick an option.
- a AgCl
- b CH₄
- c CaCl₂
- d C₁₀H₈
Answer and explanation
Correct answer: c CaCl₂
CaCl₂ is ionic and dissolves in water.
Why the other options are wrong
- a AgCl: AgCl is ionic but an exception: it does not dissolve in water.
- b CH₄: CH₄ is non-polar covalent and does not dissolve.
- d C₁₀H₈: Naphthalene is covalent and insoluble. The answer the book supports is CaCl₂.
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