1.

Assertion: First four aliphatic monocarboxylic acids are colourless. Reason: Carboxylic acids with more than five carbon atoms are insoluble in water.

Answer»

If both ASSERTION and reason are true and the reason is the CORRECT explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is false.
If the assertioin and reason both are false.

Solution :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 lyophobic, this effect predominates as -R gets larger (over five carbon ATOMS).


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