Assertion (A): 2,6-Dimethyl-4-nitrophenol (I) is more acidic than 3,5-dimethyl-4-nitrophenol (II).
Reason (R ): It is due to the steric inhibition of the resonance of `(-NO_(2))` group with two (Me) groups in (II).

" 4-nitrophenol is more acidic than "4" -methylphenol.Give reason "

(A) 4-Nitrophenol is more acidic than 2,4,6-trinitrophenol (R ) Phenol is weaker acid than carbonic acid.

Assertion (A) p-nitrophenol is more acidic than phenol. Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.

Assertion (A) p-nitrophenol is more acidic than phenol. Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.

Assertion (A) p-nitrophenol is more acidic than phenol. Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.

Assertion (A) : Ph overset (o+)(N_2) Br^(Θ) couples with N, N -dimethyl aniline (I) but not with 2,6, -dimethyl- N,N -dimethuyl aniline (II) Reason (R ): Due to steric inhibition of resonance , the p-position of (II) is not sufficiently activated fro the coupling reaction.

Assertion (A) : Ph overset (o+)(N_2) Br^(Θ) couples with N, N -dimethyl aniline (I) but not with 2,6, -dimethyl- N,N -dimethuyl aniline (II) Reason (R ): Due to steric inhibition of resonce , the p-potion of (II) is not sufficiently activated fro the coupling reation. Due to steric inhibition of resonamne, the p-position of (II) is not sufficiently activated for the coupling reaction.