Q21 of 47 Page 12

Give two ways in which melting points and boiling points can be useful.

The melting point and boiling points of a substance help us to identify a substance because different substances have different melting and boiling points.

As melting and boiling take place at a particular temperature, so melting and boiling point can also help us to test the purity of any substance.


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Give reasons for the following.

Thermometer reading remains constant for a while during melting of a solid even though we continue to heat the solid.

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Two objects at the same temperature one bigger than another are placed in contact. Will heat be transferred from one object to another? Explain.

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