The rectified spirit is________________?
Correct answer: C. 95% alcohol
- A. 12% alcohol
- B. 90% alcohol
- C. 95% alcohol
- D. 100% alcohol
Explanation
Rectified spirit is ethanol purified by fractional distillation to about 95% alcohol by volume, with the remaining water forming an azeotropic mixture. Ordinary distillation cannot produce 100% ethanol from this mixture. The likely mistake is choosing 100% because rectified spirit is highly concentrated, but absolute alcohol is the nearly water-free form.
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About Alcohols
Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.
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