Chemistry 9701 · AS & A Level · Chemical bonding

Chemical bonding — practice question

Propene, hydrogen cyanide and carbon dioxide all have $\pi$ bonds. Which of these molecules has two $\pi$ bonds?

  • Acarbon dioxide and hydrogen cyanide
  • Bcarbon dioxide and propene
  • Chydrogen cyanide and propene
  • Dhydrogen cyanide only

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