Water is boiled in a flask. Then the flask is removed from the heat and sealed with a rubber stopper. If you now cool the flask

Water is boiled in a flask. Then the flask is removed from the heat and sealed with a rubber stopper. If you now cool the flask by pouring cold water over it, the water in the flask will boil. Why?

On cooling, the air pressure in the flask drops. The boiling point of the liquid depends on the external pressure. As the pressure decreases, the boiling point also decreases.

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