UK GCSE · Chemistry

Bonding Structure and Quantitative Chemistry

16 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 16 questions

  1. Which type of bonding is found in sodium chloride?
  2. Why do ionic compounds conduct electricity when molten?
  3. Which property is typical of simple covalent molecules?
  4. Why is diamond very hard?
  5. Why can graphite conduct electricity?
  6. Why can metals be bent and shaped?
  7. What is the relative formula mass of water, H2O? (H = 1, O = 16)
  8. What is the mass of 0.5 moles of calcium carbonate, CaCO3? (Ca = 40, C = 12, O = 16)
  9. What is the percentage by mass of oxygen in carbon dioxide, CO2? (C = 12, O = 16)
  10. In a balanced equation, what must be the same on both sides?
  11. What is the balanced equation for magnesium burning in oxygen?
  12. What is the relative formula mass of calcium hydroxide, Ca(OH)2? (Ar: Ca = 40, O = 16, H = 1)
  13. What mass of calcium carbonate (Mr = 100) is 0.25 mol?
  14. A student calculates a theoretical yield of 20 g of a product but collects only 13 g. What is the percentage yield?
  15. 25.0 cm cubed of sodium hydroxide solution is neutralised by 20.0 cm cubed of 0.10 mol/dm cubed hydrochloric acid. The reaction is 1 : 1. What is the concentration of the sodium hydroxide?
  16. 10 g of calcium carbonate (Mr = 100) is heated and fully decomposes: CaCO3 gives CaO + CO2. What mass of carbon dioxide (Mr = 44) is made?

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