Question

Carbonyl compounds are best purified
by:
(A) Steam distillation.
(B) Hydrolysis of sodium bisulphite
adducts.
(C) Fractional crystallisation.
(D) Sublimation.​

Answer 1

ANSWER

(B) hydrolysis of sodium bisulphite

EXPLANATION

distillation used for alcohol type products

carbonyl compoumds have c=O group

when it react with sodium bisulphite then product is water soluble and easily back converted into original compound leaving impurities behind

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Answer 2

Answer:

The correct answer is option (B) Hydrolysis of sodium bisulphite adducts.

Explanation:

• Sodium bisulphite is the best technique for purifying carbonyl compounds. Carbonyl compounds quickly form an adduct with sodium bisulphite, which is then hydrolyzed to produce another carbonyl molecule.
• Carbonyl compounds are made up of carboxylic acids (and their derivatives), aldehydes, ketones, and quinones.
• Aldehydes, ketones, carboxylic acids, acid chlorides, acid anhydrides, esters, lactones, amides, and lactams are examples of compounds that include carbonyl groups.
• In addition, acetaldehyde has been found to be common in the atmosphere, as well as a product of hydrocarbon combustion and photooxidation.

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