Question

3. FILL IN THE BLANKS :
1. A pure substance has
melting and boiling points​

Answer 1

Answer:

A pure substance has fixed melting and boiling points.

It means that a pure substance melts completely at one fixed point(fixed temperature )and boils completely at one fixed constant point(at a fixed temperature).

Answer 2

Answer:

I think so FIXED melting and boiling point