oojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.

(i) Bubbles of air came out from the bottle.

(ii) Some water entered the bottle.

(iii) Nitrogen gas came out in the form of bubbles and oxygen gets dissolved in water.

(iv) No bubbles formed, only water entered the bottle

Which observations is/are correct?

(i) and (ii)

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(iv) only

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(iii) and (iv)

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(i) only

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Solution

The correct option is A (i) and (ii)
(i) Bubbles of air came out from the bottle.

(ii) Some water entered the bottle.

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Similar questions

John and Sam were playing with empty bottles, John took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.

(i)Water did not enter the bottle when it was in inverted position.
(ii)Bubbles of air came out from the bottle as soon as it was tilted.
(iii)Some water entered the bottle
(iv)No bubbles formed, only water entered the bottle.

Which observations is/are correct?

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Figure
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