A compound ‘X’ on heating with excess conc. sulphuric acid at 443

1.	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» 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.

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»

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.