As nouns the difference between nitrobenzene and pentachloronitrobenzene

is that nitrobenzene is a nitro derivative of benzene, C₆H₅NO₂, prepared by reacting benzene with a mixture of nitric and sulphuric acids; any of a series of such compounds having two or more nitro groups while pentachloronitrobenzene is a fungicide formally derived from nitrobenzene; it is an off-white or yellow solid with a musty odour.