i) Antiseptics are chemical which either kill or prevent the growth of microorganisms and can be applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces.
Disinfectants are chemicals which either kill or prevent the growth of microorganisms and can be applied only to inanimate objects such as floors, drainage systems, instruments etc. They are harmful to living tissues.
ii) Example for Antiseptic – Dettol Example for Disinfectant -1 % solution of phenol
iii) Antibiotics are chemical substances produced by microorganisms like bacteria, fungi and molds that inhibit the growth or even destroy other microorganisms.
e.g. Pencillin.