A substance which melts/boils at a fixed temperature is a pure substance.

True

False

I believe the correct answer is true. A substance which melts/boils at a fixed temperature is a pure substance. This is because the substance is homogeneous throughout that the properties as well would be uniform. Hope this answers the question. Have a nice day.

True

when a substance is impure, it boils over a range of temperature rather than a specific temperature