Lesson T7.2.3

T7.2.3 Acidity of metal and non-metal oxides Quiz: KS3 Chemistry, Unit 7

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T7.2.3, Acidity of metal and non-metal oxides: 20 multiple choice questions for the KS3 Chemistry (National Curriculum), Unit 7: The Periodic Table, written with Revision Ninja.

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The 20 questions

  1. What type of oxide does a typical metal form?

    • An acidic oxide
    • A basic oxide
    • A gas that burns in air
    • A neutral oxide that never reacts

  2. What type of oxide does a typical non-metal form?

    • An acidic oxide
    • A hydrogen compound
    • A basic oxide
    • A metal salt

  3. Carbon dioxide dissolves in water. What is the pH of the resulting solution?

    • Exactly 7, because it is neutral
    • Below 7, because it is acidic
    • Above 7, because it is alkaline
    • Exactly 14, because it is strongly alkaline

  4. Sulfur dioxide is released when sulfur burns. What type of oxide is it?

    • Neutral
    • Amphoteric metal
    • Acidic
    • Basic

  5. Magnesium oxide is added to an acid. What is formed?

    • A gas and a metal
    • A salt and hydrogen gas
    • A salt and water
    • Only water

  6. Which test shows that carbon dioxide gas is present?

    • Limewater turns cloudy
    • A glowing splint relights
    • A lit splint makes a squeaky pop
    • Damp litmus paper turns blue

  7. Which gas relights a glowing splint?

    • Hydrogen
    • Oxygen
    • Nitrogen
    • Carbon dioxide

  8. Which oxide is most likely to make a solution with pH above 7 when dissolved in water?

    • Sulfur dioxide
    • Sodium oxide
    • Carbon dioxide
    • Nitrogen dioxide

  9. Which statement about acidic oxides and bases is correct?

    • Acidic oxides always have a pH of 14 in solution
    • Acidic oxides can be neutralised by alkalis
    • Acidic oxides cannot react with alkalis at all
    • Acidic oxides are always metal oxides formed by heating

  10. Which pollutant is an acidic non-metal oxide?

    • Sodium oxide
    • Magnesium oxide
    • Sulfur dioxide
    • Calcium oxide

  11. Why do sulfur dioxide and nitrogen oxides cause acid rain?

    • They react with metals to form salts in the air
    • They make the rain alkaline and less harmful to plants
    • They are neutral gases with no effect on rainwater
    • They dissolve in rainwater to form acids

  12. Which group of elements usually forms oxides that dissolve in water to make alkalis?

    • Non-metals, such as sulfur and carbon
    • Halogens, such as chlorine
    • Noble gases, such as neon
    • Metals, such as sodium and calcium

  13. Which pH would a solution of sulfur trioxide in water most likely have?

    • Below 7
    • Exactly 7
    • Exactly 14
    • Above 7

  14. What does a test with universal indicator show about carbon dioxide solution?

    • It turns orange or yellow, showing an acidic solution
    • It turns green, showing a neutral solution with no acid
    • It turns purple, showing a strongly alkaline solution
    • It stays colourless, showing that no change has occurred

  15. Which property of metal oxides makes them useful in neutralising acidic soil?

    • They are non-metals that form gases
    • They are basic and react with acids
    • They are neutral and do not react
    • They are acidic and dissolve in water

  16. A student adds a little calcium oxide to dilute hydrochloric acid. What is most likely to happen?

    • The acid is neutralised to form calcium chloride and water
    • The acid makes hydrogen gas and pure calcium metal as it reacts
    • No change happens because oxides never react with acids at all
    • The acid turns into a metal and oxygen gas as it reacts

  17. Which statement about the oxide of a metal and the oxide of a non-metal is correct?

    • Metal oxides are generally acidic, while non-metal oxides are generally basic
    • Metal oxides are generally basic, while non-metal oxides are generally acidic
    • Both types of oxide always form gases when they are heated strongly in air
    • Both types of oxide are always neutral and never react with water at all

  18. Why is magnesium oxide described as a basic oxide?

    • It reacts with alkalis to form a gas and water
    • It reacts with acids to form a salt and water
    • It is always a liquid at room temperature and pressure
    • It dissolves to make an acidic solution in water

  19. Which oxide is formed when magnesium burns in air?

    • Magnesium sulfate
    • Magnesium chloride
    • Magnesium nitrate
    • Magnesium oxide

  20. Which pH range fits most normal rainwater, which contains dissolved carbon dioxide?

    • Exactly 14, which is strongly alkaline
    • Slightly below 7
    • Well above 7, which is alkaline
    • Exactly 7, which is neutral

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