Assertion
The first nine aliphatic monocarboxylic acids are colourless liquids.
Reason
Carboxylic acids with more than five carbon atoms are insoluble in water.

Both Assertion and Reasone are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The first nine aliphatic monocarboxylic acids are colourless liquids.
Carboxylic acids (RCOOH) dissolves in water due to hydrogen bonding between H-atom of -COOH group and O-atom of water. As alkyl portion R is non-polar and hydrophobic, this effect predominates as -R gets larger (over five carbon atoms).

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Assertion: Carboxylic acids have higher boiling points than alkanes.

Reason: Carboxylic acids are resonance hybrids.

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