Question

a compound X on heating with conc. sulphuric acid at 443k give an unsaturated compound Y. X also reacts with sodium metal to evolve a colourless gas Z. find X Y Z .write the equation of the chemical reaction of formation of Y and also write the role of sulphuric acid in the 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.

Answer 2

X- Ethanol CH3CH20H

Y- Ethene C2H4

Z-  Hydrogen

CH3CH2OH -----> CH2=CH2 + H2O

Sulphuric acid acts as a strong dehydrating agent