The properties of aldehydes and ketones are:

they can form hydrogen bonds in water

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they can form hydrogen bonds with themselves

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they are polar in nature

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generally boiling point decrease with the increase in molecular weight

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Solution

The correct options are
A they can form hydrogen bonds in water
B they are polar in nature
The properties of aldehydes and ketones are:
(A) They can form hydrogen bonds in water
Aldehydes and ketones contain carbonyl oxygen atom which can form hydrogen bonds with $H$ atom of the water molecule.
(C) They are polar in nature
The carbonyl group $C = O$ is polar in nature due to electronegativity difference between $C$ and $O$ atoms.
However
(B) Aldehydes and ketones cannot form hydrogen bonds with themselves as $H$ atom is not attached to electronegative $O$ atom. It is attached to $C$ atom.
(D) Generally, boiling point increases with the increase in molecular weight.

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Question 04

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(b) $H_{2} O > H F > N H_{3}$

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