Mountaineers carry oxygen cylinders with them because :

oxygen supports combustion

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air becomes thinner as we go higher

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air is denser as we go higher

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none of these

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Solution

The correct option is C air becomes thinner as we go higher
Mountaineers carry oxygen cylinder along with them because when they climb mountains, as altitude increase, the amount of oxygen level in the atmospheric air decreases as trees are not found at higher altitude.

As a result, mountaineers suffer from dizziness. It can also lead to hypoxia.

Hence, te correct option is $B$

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Similar questions

Statement I: Mountaineers carry oxygen cylinders with them when they climb high mountains.

Statement II: Layer of air gets thinner at higher altitudes and breathing becomes difficult.

Question 4

Mountaineers carry oxygen cylinders with them because :

a) There is no oxygen on high mountains.

b) There is deficiency of oxygen on mountains at high atltitude.

c) oxygen is used for cooking.

d) oxygen keeps them warm at low temperature.

Statement I: Mountaineers carry oxygen cylinders with them while climbing high mountains.

Statement II: The percentage of oxygen in air decrease with increasing altitude.

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