[" 8/ Replacement of Clof chloro-benzene to give phenol "],[" requires drastic conditions.But chlorine of "],[2,4" -dinitro-chloro-benzene is readily replaced "],[" (1) NO_2 "" donates "e^(-)" at meta position "],[" (2) NO,withdraws "e^(-)" from ortho/para positions "],[" (3) NO,make ring electron rich at ortho & para "],[" (4) NO,withdraws e- from meta position "]

Replacement of Cl of chlorobenzene to give phenol require drastic conditions but chlorine of 2,4 -dinitrochlorobenzene is readily replaced because .

The replacement of chlorine of chlorobenzene to give phenol requires drastic conditions, but the chlorine of 2,4-dinitrochlorobenzene is readily replaced since

Replacement of Cl of Chlorobenzene to give phenol requires drastie conditions, but Cl of 2, 4 -dinitro chlorobenzene is readily replaced. This is because,

Benzene ring in aniline is highly activated. This is due to the sharing of lone pair of nitrogen with the ring which results in increase in the electron density on the ring and hence facilitates the electrophilic attack. The substitution mainly takes place at ortho and para positions because electron density is more at ortho and para positions. On reaction with aqueous bromine all the ortho and para positions get substituted resulting in the formation of 2,4,6-tribromoaniline. To get a monobromo compound, the amino group is acetylated before bromination. After bromination, the bromoacetanilide is acid hydrolysed to give the desired halogenated amine. In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices: Assertion (A): Benzene ring is aniline is highly deactivated. Reason (R): In aniline, the sharing of lone pair of nitrogen with the ring increases the electron density on the ring.

Benzene ring in aniline is highly activated. This is due to the sharing of lone pair of nitrogen with the ring which results in increase in the electron density on the ring and hence facilitates the electrophilic attack. The substitution mainly takes place at ortho and para positions because electron density is more at ortho and para positions. On reaction with aqueous bromine all the ortho and para positions get substituted resulting in the formation of 2,4,6-tribromoaniline. To get a monobromo compound, the amino group is acetylated before bromination. After bromination, the bromoacetanilide is acid hydrolysed to give the desired halogenated amine. In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices: Assertion (A): In aniline -NH2 group facilitates the electrophilic attack. Reason (R): It is due to decrease in electron density on the ring.