Question

a compound x on heating with exess of sulpheric acid at 443K gives an unsaturated compound Y'.'X also react with sodium metal envolve a gas colourless gas"Z
1.INDENIFY"X."Y."Z
2.write the equation of the chemical reaction of formation of 'Y'
3.write the role of sulpheric acid in reaction

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.