a) Broad-spectrum antibiotic – Chloramphenicol Narrow
spectrum antibiotic – Penicillin G
b) Similarity
Both are chemicals which either kill or prevent the growth of microorganisms.
Difference
Antiseptics are applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces. Disinfectants are applied to inanimate objects such as floors, drainage syste, instruments, etc.