Period 3 oxides: structure and acid-base character Quiz
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5 questions, one answer each
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1. Which oxide has a giant covalent structure?
- A. MgO
- B. P₄O₁₀
- C. SiO₂
- D. SO₃
2. What is the approximate pH of a solution formed from SO₃ and water?
- A. 14
- B. 7
- C. 10
- D. 0
3. Which oxide is amphoteric?
- A. Na₂O
- B. Al₂O₃
- C. SO₂
- D. P₄O₁₀
4. What is the correct equation for sodium oxide with water?
- A. Na₂O + H₂O → NaOH
- B. Na₂O + H₂O → 2NaOH
- C. 2Na₂O + H₂O → 2NaOH
- D. Na₂O + 2H₂O → Na(OH)₂
5. Why is the melting point of SO₃ low?
- A. Strong covalent network
- B. Strong ionic lattice
- C. Weak intermolecular forces between molecules
- D. Delocalised electrons