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JEE Main levelSingle correct optionDifficulty 2 of 3nm104

The IUPAC name of $CH X_{3} CH X_{2} - NC$ (the nitrogen is bonded to the ethyl group) is:

Aisocyanoethane
Bethanamine
Cethanenitrile
Dpropanenitrile

Answer: A

An isonitrile has the -N

\equiv

C group attached through nitrogen. Substitutively it is named with the prefix isocyano on the alkane. Here it is isocyanoethane, while

CH X_{3} CH X_{2} CN

would be propanenitrile.

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