Question

How does ethanol react with conc. H₂SO₄.

Answer 1

When concentrated sulphuric acid is added to ethyl alcohol and the mixture is heated to 170°C, it dehydrates ethyl alcohol to give ethene.

\[\ce{\underset{Ethyl alcohol}{C2H5OH} ->[Conc{.} H2SO4][170^\circ C] \underset{Ethene}{CH2 = CH2} + H2O}\]