Question

A compound ‘X’ on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound ‘Y’. ‘X’ also reacts with sodium metal to evolve a colourless gas ‘Z’. Identify ‘X’, ‘Y’ and ‘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

Explanation:

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.