JEE Advanced Chemistry question

Statement 1: CH_3-CH(CH_3)-CH_2-C(=O)-OH is 3-methyl butanoic acid Statement 2: In poly functional group compounds, the substituent should be given lower number than the principal functional group

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is FalseCorrect
(D)Assertion is False, Reason is True

Answer: (C)

Solution

The functional group is at one end of a 4-carbon chain (butanoic acid), with a methyl branch at C3 (numbering from the carbon as C1 to give the functional group the lowest locant): CH_3-CH(CH_3)-CH_2-COOH is indeed 3-methylbutanoic acid, so

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Question ID VK-159238