Question

When we press the bulb of a dropper with its nozzle kept in water ,air in the dropper is seen to
escape in the form of bubbles. Once we we release the pressure on the bulb, water gets filled
in the dropper. The rise of water in the dropper is due to *
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Answer 1

Answer:

air pressure

Explanation:

Due to air pressure, the water in the dropper increases. The air in the tube and the bulb escapes in the form of bubbles when the bulb is squeezed. Because of this, pressure decreases inside the bulb. Atmospheric pressure on the liquid surface however is present. The water flows inside the tube as we release the bulb. Water passes from a higher pressure (water retained) to a lower pressure (glass tube inside).