Question

a) Phenol when treated with Con. HNO₃ gives,

i) o-Nitrophenol

ii) p-Nitropbenol

iii) 2,4,6 -Thnitro phenol

iv) a mixture of o-nitrophenol and p-nitrophenol.

b) Methanol and ethanol are two commercially important alcohols. Write one method each for the preparation of methanol and ethanol.

Answer 1

a) iii) 2,4,6-Tnnitrophenol

b) Methods of preparatIon of methanol :

1. Destructive distillation of wood.

2. Catalytic hydrogenation of carbon monoxide at high pressure and temperature in the presence of ZnO –Cr₂O₃ catalyst.

Methods of preparation of ethanol:

Fermentation: The sugar in sugarcane or grapes is converted to glucose and fructose in the presence of an enzyme invertase. Glucose and fructose are converted to ethanol and CO₂ by the enzyme zymase, which is found in yeast.

OR