Mountaineers carry cylinders filled with _____ gas as it is difficult to breathe at higher altitudes.

oxygen

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nitrogen

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carbon dioxide

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hydrogen

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Solution

The correct option is A oxygen
We breathe in oxygen gas for our survival. As we go high up the mountains, the amount of oxygen level present reduces, which can cause breathing difficulty to the people climbing these mountains. Hence, it is essential for the mountaineers to carry cylinders filled with oxygen gas along with them while climbing the mountains.

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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.

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