Multiple choice

Why do mountaineers carry oxygen cylinders with them while climbing high mountains?

  1. At high altitudes, pure oxygen is not available

  2. Oxygen available is very cold

  3. There is not sufficient amount of oxygen at higher altitudes

  4. The atmospheric pressure increases at higher altitudes

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, as height increases, the atmospheric pressure decreases. Therefore, when we move up the oxygen available for breathing becomes less and so the mountaineers need to carry oxygen cylinder to ensure sufficient oxygen supply.

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