Same chapter3 marksDifficulty: Medium
How is ethene prepared from ethanol in the laboratory? Write the equation and state the conditions.
Organic Chemistry
3 marksDifficulty: Medium
Describe a chemical test that distinguishes between ethane and ethene.
Original Khojo Papers practice question — not from a past board paper.
Answer
Bubble each gas through bromine water. Ethene, being unsaturated, decolourises the reddish-brown bromine water by an addition reaction. Ethane, being saturated, produces no change.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Unsaturated hydrocarbons undergo addition across the double bond.
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