What is the difference between a pure substance and an impure substance?
Pure and Impure Substances Chemists define the term 'pure' as a chemical that is natural. This is a substance that is made up on one type of atom. If there is more than one type of atom, then that substance is called 'impure'.
Which one of the following is not an example of pure substance?
Explanation: AIR IS NOT A PURE SUBSTANCE BECAUSE IT IS A HOMOGENEOUS MIXTURE OF DIFFERENT SUBSTANCES.20-Jul-2020
Is ketchup a pure substance?
Explanation: A homogeneous mixture is any mixture that has a uniform appearance and composition throughout. Ketchups have a uniform appearance, hence they are homogeneous mixtures.16-Sept-2017
Is a pencil a pure substance?
The question is: “Is a pencil a pure substance?” No, it is not. A pencil is composed of at least two components; the casing and the core. The casing is usually made from two pieces of wood that are held together by glue (so it is not even “pure wood”, even assuming that such a thing is possible).