Question

Number of disubstituted benzene is:
(A) $1$
(B) $2$
(C) $3$
(D) $0$

Answer 1

Hint:The electron delivering bunches direct the approaching gathering to ortho and para positions are called ortho and para coordinating gatherings, as the electron thickness is more on o-and p-positions. Hence the electrophilic replacement happens predominantly at these positions. Aromatic rings become responsive at these positions. Whereas at meta position electron thickness is less thus it is less receptive. Whereas the electron pulling out gatherings are meta coordinating.

Complete answer:
Number of disubstituted benzene is 3 which incorporates ortho, para and meta disubstituted benzenes. The sub-atomic orbital depiction includes the development of three delocalized $\pi $ orbitals traversing each of the six carbon iotas, while the valence bond portrayal includes a superposition of reverberation structures Almost certainly, this security adds to the impossible to miss sub-atomic and compound properties known as aromaticity. To precisely mirror the idea of the holding, benzene is regularly portrayed with a hover inside a hexagonal game plan of carbon molecules.

Additional information:What is the structure of Benzene?X-beam diffraction shows that every one of the six carbon-carbon bonds in benzene are of a similar length, at 140 picometres (pm). The $C - C$ bond lengths are more prominent than a twofold bond (135 pm) yet more limited than a solitary bond (147 pm). This middle distance is reliable with electron delocalization: the electrons for $C - C$ holding is disseminated similarly between every one of the six carbon iotas. Benzene has 6 hydrogen molecules – less than the comparing guardian alkane, hexane. Benzene has a comparable shape with cyclohexane fundamentally, it is just the cycle formed inside Benzene recognizing it with cyclohexane.

Thus, the correct answer to the above question is option (C).

Note:Benzene is utilized mostly as a moderate to make different synthetics, most importantly ethylbenzene, cumene, cyclohexane, nitrobenzene, and alkylbenzene. The greater part of the whole benzene creation is prepared into ethylbenzene, an antecedent to styrene, which is utilized to make polymers and plastics like polystyrene and EPS. Some 20% of the benzene creation is utilized to fabricate cumene, which is expected to deliver phenol for pitches and cements. More modest measures of benzene are utilized to make a few sorts of rubbers, greases, colours, cleansers, medications, explosives, and pesticides.