Home Preparation for National Talent Search Examination (NTSE)/ Olympiad
Chapter : 2. Is Matter Around Us Pure
Pure Substances
A pure substance consists of a single type of particles. Pure substances are always homogeneous. All the elements and compounds are pure substances because they contain only one kind of particles. A pure substance cannot be separated into other kinds of matter by any physical process. A pure substance has a fixed composition as well as a fixed boiling point and melting point. Ex. Hydrogen, Oxygen, Copper, Gold, Silver. Pure substances can be divided into two types. (A) Elements (B) Compounds