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JEE Advanced levelSingle correct optionDifficulty 3 of 3nm106

The IUPAC name of $NC - CH X_{2} - CH X_{2} - COO - CH X_{3}$ is:

Amethyl 2-cyanopropanoate
B3-(methoxycarbonyl)propanenitrile
Cmethyl 3-isocyanopropanoate
Dmethyl 3-cyanopropanoate

Answer: D

The ester outranks the nitrile, so the name is an alkyl alkanoate. The acid part is a three-carbon chain with the ester carbon as C-1, so the cyano group is on C-3. The alkyl word is methyl, giving methyl 3-cyanopropanoate.

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