Discussion Forum

 Match the following four starting materials (P, Q, R, S)  given in list I with the corresponding reaction scheme. (I, II, III, IV)  provided in List II and select  the correct answer using the code  given below the lists,

Answer:

Explanation:

Plan This problem  can be solved by using  various concepts synthesis of benzene, electrophilic substitution reaction and directive  influence  of various  substituents, including oxidation  and reduction

 $\Rightarrow$     -OH  and -NH₂  are o/p - directing groups.

 $\Rightarrow$          N-acetylation is more favourable than C- acylation

 $\Rightarrow$           N- sulphonation is more favourable than C-sulphonation.

 $\Rightarrow$            NO₂  is a meta- directing group.

 $\Rightarrow$      H₂S-NH₃  reduces only one NO₂ group selectively in the presence of two NO₂ groups.

Using above concepts the correct sequence of reaction can be written as