Question

A pure substance is made up of:

• A. only one kind of particles
• B. two kinds of particles
• C. more than two types of particles
• D. none of the above

Answer 1

The correct option is A only one kind of particles

All the elements and compounds are pure substances because they contain only one kind of particle.

For example, Hydrogen, oxygen, nitrogen, chlorine, iodine, carbon, iron, copper, etc are pure substances(elements).

Water, sodium chloride, hydrochloric acid, camphor, etc are pure substances (compounds).