Question

why does water don't overflow when boiled while milk overflow ?plz tell me the answer with explanation.​

Answer 1

Water does not overflow even when boiled but milk overflows rapidly because milk is a mixture.

Milk is, in fact, an emulsion of fat and water. When we boil milk, the molecules of fat, sugar, proteins and minerals get separated eventually. All these molecules are lighter than milk, they collect on the topmost surface to form the layer of cream.

Now, as the milk furthermore continues to get heated, out of the 87 percent of water, some of it gets converted into vapour. Now, when the vapour pressure below the film increases suddenly, bubble formation occurs. These rising bubbles of the water vapor eventually makes the milk overflow.

While when we heat water, no such film is formed and water vapour escapes without any resistance. Hence, it doesn't overflow on boiling.

Hope it helps!

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Answer 2

Answer:It does because milk is not a pure mixture of liquid. It has other molecules also with it other than water such as fat, carbohydrates, proteins. By which they react to heat by trapping rising bubbles of steam cause by boiling the water to the heat. This creates the foam of the bubbles on top of the vessel, which increases the volume of the mixture automatically.

Explanation: