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ICSE Class 10 Chemistry Question 10 of 23

Solved 2025 Specimen Paper ICSE Class 10 Chemistry — Question 14

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14
Question

Question 1(xiv)

Which of the following about oxides is correct?

  1. A basic oxide is an oxide of a non-metal
  2. Acidic oxides contain ionic bonds
  3. Amphoteric oxides contain a metal
  4. Basic oxides are always gases
Answer

Amphoteric oxides contain a metal

Reason — Let's analyze each option:

  1. A basic oxide is an oxide of a non-metal: This is incorrect. Basic oxides are typically oxides of metals. For example, calcium oxide (CaO) and magnesium oxide (MgO) are basic oxides, and both contain metals.

  2. Acidic oxides contain ionic bonds: This is incorrect. Acidic oxides are usually covalent compounds. They are generally formed by non-metals, such as sulphur dioxide (SO₂) and carbon dioxide (CO₂), and tend to form acids when dissolved in water.

  3. Amphoteric oxides contain a metal: This is correct. Amphoteric oxides, such as aluminum oxide (Al₂O₃) and zinc oxide (ZnO), contain metals and can react both as acids and bases.

  4. Basic oxides are always gases: This is incorrect. Basic oxides are typically solid at room temperature. For example, calcium oxide (CaO) and magnesium oxide (MgO) are solid basic oxides.