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Structural and Physical Properties of Carbonyls

Aldehydes and...

Question

Aldehydes and ketones with ______ or more carbon atoms are either sparingly soluble or insoluble in water.

A

5

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B

6

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C

7

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D

8

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Solution

The correct option is D 5
Aldehydes and ketones more than $C - 5$ are soluble in benzene, ether etc.

Lower aldehydes and ketones are soluble in water.

Higher aldehydes and ketones the solubility in water decreases rapidly due to hydrogen bonding.

Hence the correct option is A.

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Q. Why the lower members of aldehyde and ketone are soluble in water while higher members are sparingly soluble or insoluble in water?

Q. Assertion :All s-block salt of thiosulphates are either water soluble or sparingly soluble. Reason: Barium thiosulphate is insoluble in water.

Q. Account for the following:
Carboxylic acids with five or fewer carbon atoms are water soluble but, higher ones are insoluble.

Q. Statement- I: Lower aldehydes and ketones are soluble in water. The solubility decreases as the molecular mass increases.
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Reason (R) Alkyl groups are electron releasing groups

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