Chemistry 0620 · IGCSE · Air quality and climate

Air quality and climate — practice question

A previously unknown planet has been found, and the gases in its atmosphere have been examined. The table gives the proportions of the gases in its atmosphere. Which gases are found in the planet’s atmosphere at a greater percentage than in Earth’s atmosphere?

  • Acarbon dioxide and oxygen
  • Bcarbon dioxide only
  • Cnitrogen and oxygen
  • Dnitrogen only

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