Question

What is a pure substance? Which of the following materials fall in the category of a pure substance?

Answer 1

Answer:

Pure substance:-Elements which contain only one kind of substance are termed as pure substance.

For eg:-Hydrogen,oxygen

Hope it helps you...

Answer 2

Pure substances are substances that are made up of only one kind of particles and has a fixed or constant structure.
All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances.