Question

Cyclohexanone on treatment with hydroxylamine gives P, which on treatment with sulphuric acid gives Q. When Q is heated with water at high temperature, R is obtained. Identify R.

a) Nylon-6

b) Caprolactam

c) Amino caproic acid

d) Nylon-6,6

Answer 1

Answer : a) Nylon-6

Explanation :

Reactions :

Cyclohexanone + hydroxylamine --->P

P + H2SO4  ----->Q

Q +  H2O + heating   ---->  R

Nylon-6 is the polymer of caprolactam (Q), which is obtained from the oxidation of cyclohexane to give cyclohexanone(P), followed by treatment with H2SO4. Caprolactam on heating with water gives amino caproic acid which polymerises to nylon-6.

a) Nylon-6