Question

a compound X on heating with excess conc.sulphuric acid at 433K gives an unsaturated compound Y. X also reacts with sodium metal to evolve a colourless gas Z. identify X,Y,Z. write the equation of the chemical reaction of formation of Y and also write the rope 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.

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