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6. Which of these is the general formula for an alkane

  • Cn H2n +5
  • Cn H2n
  • Cn H2n +3
  • Cn H2n +2
  • Cn H2n +4

7. What is produced by power stations and is the main cause of acid rain?

  • Carbon Monoxide
  • Carbon Dioxide
  • Sulphur Dioxide
  • Dihydrogenoxide