A compound 'X' of molecular formula C2H6O on heating with excess conc. Sulfuric acid at 443 K gives an unsaturated compound 'Y' . 'X' also reacts with sodium metal to evolve a colorless gas 'Z'. Identify 'X','Y' and 'Z'. Write the equation of the chemical reaction of formation of 'Y' and also write the role of sulfuric acid in the reaction.

Explanation

X is `CH_(3)CH_(2)OH` (Ethanol).
Y is `CH_(2) = CH_(2)` (Ethene)
Z is `H_(2)` (Hydrogen gas) .
`underset("Ethanol")(CH_(3)CH_(2)OH)underset(underset("Dehydration")"443K")overset("Conc." H_(2)SO_(4))rarr underset("Ethene")(CH_(2)=CH_(2))+H_(2)O`
Concentrated sulphuric acid ats as a dehydrating agent
`2C_(2)H_(5)OH rarr 2C_(2)H_(5)ONa + underset(("Hydrogen gas")(Z))(H_(2))uarr`