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ICSE Class 10 Chemistry Question 3 of 22

Solved 2024 Question Paper ICSE Class 10 Chemistry — Question 6

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6
Question

Question 1(vi)

Conversion of Ethanol to Ethene by the action of concentrated sulphuric acid involves:

  1. Dehydration
  2. Dehydrogenation
  3. Dehydrohalogenation
  4. Hydrolysis
Answer

Dehydration

Reason — Dehydration involves elimination of elements of water from alcohol. Conc. sulphuric acid act as dehydrating agent.

C2H5OH ethyl alcohol→170°CConc. H2SO4[excess]C2H4ethene+H2O \underset{\text{ ethyl alcohol}}{\text{C}_2\text{H}_5\text{OH}} \xrightarrow[170\degree\text{C}]{\text{Conc. H}_2\text{SO}_4\text{[excess]}} \underset{ \text{ethene}}{\text{C}_2\text{H}_4} + \text{H}_2\text{O}\

The products formed are ethene and water.