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Question

In figure (b), pressure of air above the hydrometer is:

130770_2de2ee1dc3a54f07a7d2a0abf06e74a3.png

A
less than atmospheric
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B
atmospheric
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C
more than atmospheric
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D
Can't be said
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Solution

The correct option is B atmospheric
Since the liquid is rising above hence the pressure of air above the hydrometer is less than that at bottom i.e. atmospheric pressure.

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