The correct statement regarding addition of sodium hydrogen sulphite to a carbonyl compound is

It can be used as a method to purify and separate aldehyde

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Bisulphite addition product cannot be hydrolysed in basic medium

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The attack happens by the negetive charge on oxygen

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The rate of addition is always greater for ketones than aldehydes

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Solution

The correct option is A It can be used as a method to purify and separate aldehyde
The attack happens by lone pair over sulphur. The rate of addition is much grater for aldehydes and can be used for purification/separation bisulphite addition can be reversed by acidic as well as basic hydrolysis.

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The correct statement regarding addition of sodium hydrogen sulphite to a carbonyl compound is

The correct option is A It can be used as a method to purify and separate aldehydeThe attack happens by lone pair over sulphur. The rate of addition is much grater for aldehydes and can be used for purification/separation bisulphite addition can be reversed by acidic as well as basic hydrolysis.

The correct option is A It can be used as a method to purify and separate aldehyde
The attack happens by lone pair over sulphur. The rate of addition is much grater for aldehydes and can be used for purification/separation bisulphite addition can be reversed by acidic as well as basic hydrolysis.