Chlorobenzene has Cl attached to an sp² carbon of the benzene ring, while chlorocyclohexane has Cl attached to an sp³ carbon.
Statement B is correct: the C-Cl bond has partial double bond character due to resonance with the aromatic π system, where chlorine's lone pairs interact with the aromatic ring.
Statement C is correct: the C-Cl bond is less polar in chlorobenzene because the resonance contribution reduces the electronegativity difference between C and Cl.
Statement E is correct: the C-Cl bond is formed using sp² hybridized orbital of carbon.
Statement A is incorrect because chlorine carries less negative charge due to resonance donation to the aromatic system.
Statement D is incorrect because the C-Cl bond is actually shorter in chlorobenzene due to partial double bond character, not longer.
The correct statements are B, C, and E only.