Question

pad.
0. 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 release the
pressure on the bulb, water gets filled in the dropper. The rise of water in
the dropper is due to
(a) pressure of water.
(b) gravity of the earth.
(c) shape of rubber bulb.
(d) atmospheric pressure.​

Answer 1

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

a) pressure of water.

Explanation: The rise of water in the dropper is due to atmospheric pressure. When the bulb of a dropper is pressed, the pressure inside the dropper decreases and this causes the water to go inside the dropper.

I hope this might help you :)