Garima observed that when she left her tightly capped bottle full of water in open sunlight, tiny bubbles formed all around the bottle. The bubble formed due to:

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Dissolved air starts escaping due to heat

Water vapour gets condensed

Water gets evaporated

As dissolved salt starts evaporating

answer is A.

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Detailed Solution

Garima observed that when she left her tightly capped bottle full of water in open sunlight, tiny bubbles formed all around inside the bottle. The bubble formed due to dissolved air starts escaping due to heat.
Air is present all around us, and the gases present in air dissolve in water easily, so the air is soluble in water. On heating, air expands. Therefore, when a tightly capped bottle full of water is kept in sunlight, the air dissolved in that water gets heated by the sun and starts escaping in the form of tiny bubbles.

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