Question

A pure substances made up of molecules of same kind

Answer 1

Not every substance is pure but we assume it pure at macromolecular level because every substance has some defects in it.

Answer 2

Pure means
______________

that it contains only one type of matter or particles .( one kind of atoms or molecules)

______________
for example
___________________

Hydrogen, oxygen, carbon, silicon.....

Hope this helps you....