Ionic Compounds and Their Properties MCQs
Practice Ionic Compounds and Their Properties multiple-choice questions from Metals and Non-metals (Class 10 Science) - tap an answer for instant feedback and a step-by-step solution. Practice the full set free on the RankByte app.
Ionic Compounds and Their PropertiesQuiz - Solve & Score
Q1. Which compound is ionic (NCERT)?
- A.carbon dioxide
- B.water
- C.methane
- D.calcium chloride
Answer: D. calcium chloride
Eliminate first - option A) 'carbon dioxide' is incorrect: CO2 is covalent; option B) 'water' is wrong because Water is a covalent molecule; option C) 'methane' fails since Methane is covalent. That leaves only option D). Confirm with the chapter rule: An ionic bond forms when a metal donates electrons to a non-metal: e.g. Na -> Na+ + e-, Cl + e- -> Cl-, and Na+ + Cl- -> NaCl; the resulting solid is held by strong electrostatic attraction => this fixes the property asked in the stem; hence the answer = calcium chloride (chemistry, chapter 'Metals and Non-metals'). Answer: D) calcium chloride.
Q2. Which property is NOT typical of an ionic compound?
- A.soluble in water
- B.high boiling point
- C.low melting point
- D.conducts when molten
Answer: C. low melting point
The idea this question leans on: An ionic bond forms when a metal donates electrons to a non-metal: e.g. Na -> Na+ + e-, Cl + e- -> Cl-, and Na+ + Cl- -> NaCl; the resulting solid is held by strong electrostatic attraction => this fixes the property asked in the stem; hence the answer = low melting point. That fits the listed correct option directly - Correct. Quickly on the wrong ones: option A) 'soluble in water' is incorrect: Many ionic compounds are water-soluble; option B) 'high boiling point' misses the point - Ionic compounds have high boiling points. Hence the answer is C) low melting point.
Q3. Which compound is most likely ionic?
- A.water
- B.potassium bromide
- C.methane
- D.carbon dioxide
Answer: B. potassium bromide
NCERT fact (chemistry, chapter 'Metals and Non-metals'): An ionic bond forms when a metal donates electrons to a non-metal: e.g. Na -> Na+ + e-, Cl + e- -> Cl-, and Na+ + Cl- -> NaCl; the resulting solid is held by strong electrostatic attraction => this fixes the property asked in the stem; hence the answer = potassium bromide. Why option B fits - Correct. Distractor analysis: option A) 'water' is incorrect: Water is a covalent (polar) molecule; option C) 'methane' doesn't hold - Methane is a covalent molecule. Final answer - B) potassium bromide.
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