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Question

In the below scenario, the rise of liquid in the straw is due to

A
Pressure of water
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B
Gravity of the earth
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C
Shape of the rubber bulb
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D
Atmospheric pressure
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Solution

The correct option is D Atmospheric pressure
When we suck, low pressure region is created inside our lungs by increasing the volume of our lungs, thus outside liquid comes into our mouth due to the outside atmospheric pressure.

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