Question

A compund x on heating with excess conc. Sulphuric acid at 443 k gives an unsaturated compund y.X also reqcts with sodium metal to evolve a colourless gas z name the compunds x yand z

Answer 1

X →443 Kconc. H2SO4 Y ( unsaturated compound)
Z is hydrogen (Colourless gas) 

X, Y and Z are alcohol, alkene and hydrogen respectively.

Suppose X is ethanol,it gives alkene on reacting with conc. H2SO4

 C2H5OH (X) →443 Kconc. H2SO4  C2H4 (Y)

2C2H5OH →Na2C2H5O-Na+ + H2 (Z)

Role of sulphuric acid: It is used as a dehydrating agent in the above reaction.