preparation of phenol

Question 1

dow process

Answer 1

benzene-cl + NaOH—–>benzene-OH

Question 2

from diazonium salt

Answer 2

benzene-n2^+cl^- —–>benzene-OH

-warm h2o

Question 3

from benzene

Answer 3

benzene——>benzene-SO3H——->benzene-so3na——

    conc. h2so4                 naOH                             naOH - ---->benzene-OH