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JEE Main levelSingle correct optionDifficulty 2 of 3nm138

Which of the following is an isomer of nitroethane, $CH X_{3} CH X_{2} NO X_{2}$ ?

A $CH X_{3} NO X_{2}$
B $CH X_{3} CH X_{2} - O - N = O$
C $CH X_{3} CH X_{2} NO$
D $CH X_{3} CH X_{2} CH X_{2} NO X_{2}$

Answer: B

Nitroethane is

C X_{2} H X_{5} NO X_{2}

. Ethyl nitrite,

CH X_{3} CH X_{2} ONO

, has the same formula but bonds through O (nitrite) rather than N (nitro), so it is a functional isomer. The others have formulas

C X_{3} H X_{7} NO X_{2}

,

CH X_{3} NO X_{2}

and

C X_{2} H X_{5} NO

.

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