Question 1 What are pure substances.Give examples?
Question 2 What are the two types of pure substances.Give example of each?
Question 3 What are mixtures.Give example?
Question 4 What are the characteristics of pure substances?
Question 5 What are the characteristics of impure substances?
Water, ,sodium chloride,Hydrochloric acid,Camphor etc. are pure substances(compounds).
A mixture is one which contains two or more different kinds of particles(atoms or molecules).