Chemistry- Hydrocarbons, alkanes and alkenes

Questions for GCSE Chemistry 

1. What is the word equation for complete combustion?

  • Methane + Oxygen ---> Carbon dioxide + Oxygen
  • Methane + Oxygen ---> Carbon dioxide + Water
  • Fuel + Oxygen ---> Carbon monoxide + Water
  • Ethane + Oxygen ---> Carbon dioxide + Poly(e)thene
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2. What is a covalent bond?

  • The bond between to molecules
  • A bond involving the transfer of electrons from one atom to another
  • A shared pair of electrons
  • Two electrons joined together

3. Which is one reason why polymers are difficult to dispose of?

  • They don't burn easily
  • They do not break down easily
  • They have a high boiling point
  • They are very reactive

4. Which of these is a molecular compound?

  • Sodium chloride
  • Calcium oxide
  • Hydrogen chloride
  • Hydrogen oxide

5. Which of these is a natural polymer?

  • Neoprene
  • Poly(e)thene
  • Silk
  • Nanoethene

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