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Question

Atmospheric pressure with an increase in altitude.

A
increases
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B
decreases
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C
remains unchanged
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Solution

The correct option is B decreases
Atmospheric pressure depends on the number of air molecules. More the number of molecules more is the atmospheric pressure.
The atmospheric pressure decreases as the altitude from the sea level increases.
This is since the air molecules near the Earth's surface are more in number as the gravitational force of Earth pulls them downward.
As we move upwards, the number of air molecules decreases and the resulting atmospheric pressure also decreases.

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