Absolute alcohol is obtained when rectified spirit is treated with__________________?
Correct answer: D. CaO
- A. Ca(OH)2
- B. CaCO3
- C. CaCl2
- D. CaO
Explanation
Rectified spirit still contains water, and quicklime, CaO, removes it by reacting to form calcium hydroxide: CaO + H2O produces Ca(OH)2. CaCl2 can also act as a drying agent in some situations, but CaO is the traditional reagent used to prepare absolute alcohol from rectified spirit.
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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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