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Ethanol is dehydrated using concentrated sulfuric acid under two different temperature conditions: Reaction 1: CH3CH2OH + conc. H2SO4 at 140 deg C -> Product P1 (major) Reaction 2: CH3CH2OH + conc. H2SO4 at 180 deg C -> Product P2 (major) Which of the following statements about P1 and P2 is correct?
- Both P1 and P2 are diethyl ether
- P1 is diethyl ether
- P2 is ethene
- Both P1 and P2 are ethene
Correct answer: P1 is diethyl ether
Solution
At 140 deg C, two molecules of ethanol lose water to form diethyl ether (P1). At 180 deg C, a single ethanol molecule loses water to form ethene (P2). Both options 'P1 is diethyl ether' and 'P2 is ethene' are correct, but the most precisely stated single correct option is 'P1 is diethyl ether'.
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