What are the two types of pure substance? Give one example of each type.

What elements do the following compounds contain?

Sugar, Common salt

What are pure substances? Give two examples of pure substances.

Which of the following are ‘pure substance’?

Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air

What is the other name for impure substances? Give two examples of impure substances.