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Ethanol reacted with concentrated H2SO4 at 140 deg C gives major product P1. Ethanol reacted with concentrated H2SO4 at 180 deg C gives major product P2. Which of the following statements is/are correct?
- P1 and P2 are both diethyl ether
- P1 is diethyl ether
- P2 is ethene
- P1 and P2 are both ethene
Correct answer: P2 is ethene
Solution
At 140 deg C: two ethanol molecules undergo intermolecular dehydration -> diethyl ether (CH3CH2-O-CH2CH3). At 180 deg C: intramolecular elimination -> ethene (CH2=CH2) + water. So B (P1 is diethyl ether) and C (P2 is ethene) are both correct. A and D are wrong.
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