Same chapter3 marksDifficulty: Medium
How would you distinguish between ethane and ethene using bromine water?
Organic Chemistry
3 marksDifficulty: Medium
How is ethene prepared from ethanol in the laboratory? Write the equation and state the conditions.
Original Khojo Papers practice question — not from a past board paper.
Answer
Ethanol is heated with excess concentrated sulphuric acid at about 170 °C: C2H5OH → C2H4 + H2O. The sulphuric acid acts as a dehydrating agent.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The temperature matters: at about 140 °C ethoxyethane is formed instead.
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