Question

pure substance? boiling pointand melting point explain.

Answer 1

a pure substance is a substance which doesn't have any impurities and is made up of only one type of atom. boiling point is a temperature point at which liquid starts boiling at atmospheric pressure. melting point of a substance is a temperature point at which the object starts melting at atmospheric pressure.

Answer 2

the substance which is made up of a particular atoms is known as pure substance
the temp. at which a substance starts boiling is called boiling point
the temp. at which a substance starts melting is called melting point
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