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Boss quiz

10 questions on the whole topic. You get one try at each.

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  1. Magnesium burns in air. What is the product?

    • Magnesium carbonate
    • Magnesium hydroxide
    • Magnesium chloride
    • Magnesium oxide

  2. Sulfur is a non-metal. What kind of oxide does it make when it burns?

    • A basic oxide
    • An acidic oxide
    • An alkali
    • A metal oxide

  3. What does iron need in order to rust?

    • Water only
    • Oxygen only
    • Carbon dioxide and water
    • Oxygen and water

  4. A metal fizzes in dilute acid. Which gas is in the bubbles?

    • Hydrogen
    • Oxygen
    • Carbon dioxide
    • Nitrogen

  5. Which of these metals reacts with cold water?

    • Zinc
    • Gold
    • Copper
    • Calcium

  6. Which list is in order, from the most reactive to the least reactive?

    • Copper, iron, magnesium, sodium
    • Sodium, magnesium, iron, copper
    • Magnesium, sodium, copper, iron
    • Iron, sodium, copper, magnesium

  7. An iron nail is put into copper sulfate solution. What happens?

    • Nothing happens
    • Copper coats the nail
    • The solution turns a darker blue
    • The nail dissolves at once

  8. Copper is put into magnesium sulfate solution. Why is there no reaction?

    • The solution is too cold
    • Copper is more reactive than magnesium
    • Copper is less reactive than magnesium
    • Copper is not a metal

  9. Which metal can be extracted by heating its oxide with carbon?

    • Iron
    • Sodium
    • Calcium
    • Aluminium

  10. Reinforced concrete is concrete with steel bars inside. What kind of material is it?

    • An element
    • A polymer
    • A composite
    • A ceramic
Answers
  1. Magnesium oxide. magnesium + oxygen → magnesium oxide.
  2. An acidic oxide. Most non-metal oxides are acidic. Sulfur dioxide dissolves in water to make an acid.
  3. Oxygen and water. Iron rusts only when oxygen and water are both there.
  4. Hydrogen. metal + acid → salt + hydrogen.
  5. Calcium. Calcium is near the top of the reactivity series. It fizzes steadily in cold water.
  6. Sodium, magnesium, iron, copper. Sodium is near the top of the series. Copper is near the bottom.
  7. Copper coats the nail. Iron is more reactive than copper, so it displaces the copper from the solution.
  8. Copper is less reactive than magnesium. Only a more reactive metal can displace a less reactive one.
  9. Iron. Iron is below carbon in the reactivity series. The other three are above it and need electrolysis.
  10. A composite. A composite is made by combining two or more materials.