The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives:
Correct answer: B. Diethyl ether
- A. Ethene (ethylene)
- B. Diethyl ether
- C. Alcohol
- D. Carboxylic acid
Explanation
When ethanol is heated with conc. H2SO4 at140∘C (413K), the product obtained is diethyl ether. 2C2H5OH+H2SO4at 140∘C(413K)---------->C2H5−O−C2H5+H2O
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About Alcohols and Phenols
Alcohols are classified as primary, secondary or tertiary and studied through their hydrogen bonding, acidity, oxidation and reactions with active metals, acids and halogenating agents. Phenols require separate treatment because the hydroxyl group is attached to an aromatic ring, making their acidity and electrophilic substitution different from ordinary alcohols.
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