Multiple choice

Mountaineers carry oxygen cylinders on high altitudes because

  1. the volume of water vapours sharply decreases on high altitudes

  2. the volume of carbon dioxide sharply decreases on high altitudes

  3. the volume of nitrogen sharply increases on high altitudes

  4. the volume of oxygen sharply decreases on high altitudes

  5. the volume of carbon dioxide sharply increases on high altitudes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Mountaineers carry oxygen cylinders on high altitudes because the volume of oxygen sharply decreases on high altitudes.

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