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 AgI
- b AgCl
- c CaCl₂
- d BaSO₄
Answer and explanation
Correct answer: c CaCl₂
CaCl₂ is ionic; the δ⁻ and δ⁺ ends of water pull Ca²⁺ and Cl⁻ apart, so it dissolves.
Why the other options are wrong
- a AgI: AgI does not dissolve in water, like AgCl it is a silver salt.
- b AgCl: AgCl is ionic yet does not dissolve in water: the book's exception.
- d BaSO₄: BaSO₄ is ionic yet does not dissolve in water; it is one of the exceptions, though the book names only AgCl.
More board questions on this topic
- Which does not dissolve in water?
- The compound CCl₄:
- Which of these dissolves in water?
- Which compound shows polarity?
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