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Variation of Atmospheric Pressure with Altitude.

A hydrogen-fi...

Question

A hydrogen-filled balloon expands as it rises and may even burst after rising very high in the atmosphere. This happens because

A

The temperature increases with height

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B

The temperature decreases with height

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C

The atmospheric pressure increases with height

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D

The atmospheric pressure decreases with height

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Solution

The correct option is D The atmospheric pressure decreases with height
The atmospheric pressure exists due to weight of atmospheric gases above a certain given height. As one goes high, the weight of atmosphere above decreases and so does the pressure. Thus for a balloon filled on ground, the pressure inside the balloon exceeds that outside and thus it bursts.

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