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A barometer is kept inside a bell jar Air is slowly...

This question belongs to General Knowledge Physics
Physics
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A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.

Answer & Solution
Correct Answer: Option A
As the pump removes the air from the bell jar the pressure obviously reduces around the barometer. The reduction in pressure around the barometer leads it to expand. As the pump removes air from the jar, the mercury level rises.
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