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Ketones have ...

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Ketones have 2 alkyl groups attached to carbonyl carbon while aldehydes have one alkyl group. Alkyl groups decrease polarity. In this case how are ketones more polar than aldehydes?

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Q. Assertion (A) : The solubility of aldehydes and ketones in water decreases with increase of size of the alkyl group
Reason (R) Alkyl groups are electron releasing groups

Q. The carbon atom in carbonyl group is ______ hybridised. The carbonyl group in aldehydes and ketones undergoes ______ reactions. Aldehydes which have

α

- H atom undergo ______ reaction while aldehydes which have no

α

-H atom undergo _______ reaction.

Q. Choose the correct order of alkyl group attached to aldehyde that prefer the nucleophilic addition at carbonyl carbon?

Aldehydes and ketones both contain the carbonyl group.

Q. Assertion :Ketones are less electrophilic than aldehydes. Reason: The positive inductive effect of the second alkyl radical reinforces that of the first one decreasing still further the partial positive charge on the carbonyl carbon atom.This reduces the attraction of the atom for nucleophilic reagents. Hence ketones are less electrophilic.

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