When we heat water, bubbles start coming from it after some time. This shows that:

air contains water

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water contains dissolved minerals

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water contains air

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water contains impurities

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Solution

The correct option is C water contains air
Water contains air dissolved in it. When you heat water, the air dissolved in it escapes. This air is what we see as bubbles, when the water starts boiling due to the heat.

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When we heat water, we find bubbles forming in it. This shows that ___ .

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