Lesson 4.7.2.1

4.7.2.1 Structure and formulae of alkenes Quiz: AQA Chemistry, Unit 7

20 questions

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Lesson 4.7.2.1, Structure and formulae of alkenes: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 7: Organic chemistry, written with Revision Ninja.

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The 20 questions

  1. What is the general formula of the alkene homologous series?

    • CnHn
    • CnH2n
    • CnH2n+2
    • CnH2n-2
  2. What structural feature defines an alkene?

    • A carbon-carbon double bond
    • A carbon-carbon triple bond
    • An -OH group
    • A carbon-oxygen single bond
  3. What is the molecular formula of the alkene containing six carbon atoms?

    • C6H10
    • C6H12
    • C5H10
    • C6H14
  4. What is the name of the alkene with 2 carbon atoms?

    • Propene
    • Ethene
    • Ethyne
    • Ethane
  5. Which of these is one of the first four alkenes?

    • Methanol
    • Butene
    • Ethanoic acid
    • Butane
  6. Which alkene has 3 carbon atoms?

    • Propane
    • Butene
    • Propene
    • Ethene
  7. Which formula is that of propene?

    • C3H8
    • C4H8
    • C3H4
    • C3H6
  8. Which formula belongs to the alkene with 5 carbon atoms?

    • C5H10
    • C5H14
    • C5H12
    • C5H8
  9. How many hydrogen atoms does butene (C4H8) have compared with butane?

    • The same number
    • Two fewer
    • Four fewer
    • Two more
  10. Which of these molecules is an alkene?

    • C6H12
    • C6H6
    • C6H14
    • C6H16
  11. Which molecular formula represents an alkene?

    • C4H10
    • C6H14
    • C5H10
    • C5H12
  12. A molecule drawn as C2H4 is which alkene?

    • Propene
    • Ethene
    • Ethane
    • Ethanol
  13. Which name would be wrong for an alkene?

    • Butene
    • Propane
    • Pentene
    • Propene
  14. Which molecule is unsaturated?

    • C3H6
    • CH4
    • C3H8
    • C2H6
  15. How does the molecular formula of ethene differ from that of ethane?

    • Two extra carbons
    • Two fewer carbons
    • Two extra hydrogens
    • Two fewer hydrogens
  16. Which alkane has the same number of carbon atoms as butene?

    • Pentane
    • Ethane
    • Propane
    • Butane
  17. What feature makes alkenes more reactive than alkanes?

    • Ionic bonds
    • Shorter carbon chains
    • Extra hydrogen atoms
    • Carbon-carbon double bond
  18. An alkene has formula CnH2n. For n = 7, what is its formula?

    • C7H14
    • C7H10
    • C7H12
    • C7H16
  19. Which pair is an alkane and an alkene with the same carbon number?

    • C6H14 and C6H16
    • C6H12 and C6H10
    • C6H10 and C6H8
    • C6H14 and C6H12
  20. What is the defining chemical feature of all alkenes?

    • A carboxyl group
    • A hydroxyl group
    • Double carbon-carbon bond
    • Single carbon bonds

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