Question

Both elements and compounds are________ (pure or impure) substances.

Answer 1

Basically, there are two types of substances, that is, pure and impure. Pure substance is made up of one type of molecule whereas an impure substance is made up of more than one type of molecule.

Complete answer:
Now, here in this question we are asked whether the elements and compounds are pure or impure. So, first of all let’s understand what elements and compounds are.
So, elements are basically those substances that are pure, that is, they are made of one type of particle or atoms. We have a list of elements in a periodic table and we know that these elements cannot be broken down using any physical or chemical method since elements are the simplest form.
And compounds are also pure substances but they are composed of more than one type of atoms or molecules but unlike elements, compounds can be broken down into simpler substances using some chemical methods but cannot be broken down into anything simpler using any physical methods.
Certain examples of pure and impure substances are:
Examples of pure substances: Diamond, Sulphur, oxygen, ammonia
Examples of impure substances: milk and serial, rocks, muddy water, milkshake.
Therefore, the correct option is (A) Pure.

Note:
We know that anything that occupies space is known as matter that is further divided into several forms such as: solid, liquid and gas. Except for this they are also divided into pure and impure substances, that is, composed of one type of atom or more than one type of atom.