Q14 of 23 Page 4

Write the structural formula of ethanol. What happens when it is heated with an excess of conc. H2SO4 at 443 K? Write the chemical equation for the reaction stating the role of conc. H2SO4 in this reaction. (CBSE 2017)

The structural formula of ethanol is CH3CH2OH.

When ethanol is heated with an excess of conc. Sulphuric acid at 443 K it gives ethane. Here conc. Sulphuric acid acts as a dehydrating agent.


CH3CH2OH → CH2=CH2 + H2O

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