2 practice sets · Page 1 of 1
Which of the following is an example of a pure substance?
Hydrogen
Salt solution
Sand and water
Air
Correct Answer: A — Hydrogen
Explanation:
Hydrogen is a pure substance consisting of only one type of atom.
What is a pure substance?
A substance with only one type of molecule
A substance with a mixture of different molecules
A substance that can be separated into two or more components
A substance that is impure
Correct Answer: A — A substance with only one type of molecule
Explanation:
A pure substance contains only one type of particle and cannot be separated by physical methods.
