Question

Phenol react with conc. H2SO4 to form phenol-2,4-disulphonic acid, which when treated with conc.HNO3 produce 1) Sulphanilic acid 2) Picric acid 3) p-nitrophenol 4) 1,3,5-trinitrophenol

Answer 1

Answer:

picric acid

Step-by-step explanation:

With concentrated nitric acid, phenol is converted to 2,4,6-trinitrophenol. The product is commonly known as picric acid.  

The yield of the reaction product is poor.

Nowadays picric acid is prepared by treating phenol first with concentrated sulphuric acid which converts it to phenol-2,4-disulphonic acid, and then with concentrated nitric acid to get 2,4,6-trinitrophenol.

Answer 2

Step-by-step explanation:

Phenol reacts with cns HNO3 and H2SO4 to give picric acid

2,4,6-trinitrophenol.

Phenol reacts with dil  HNO3 t give ortho or para substitution