How many constitutional isomers of monochloro product are obtained when 3-methylpentane, CH3CH2CH(CH3)CH2CH3, is treated with Cl2 and light? (Stereoisomers are not counted separately.)

JEE Main levelSingle correct optionDifficulty 2 of 3o2067

How many constitutional isomers of monochloro product are obtained when 3-methylpentane, $CH X_{3} CH X_{2} CH (CH X_{3}) CH X_{2} CH X_{3}$ , is treated with $Cl X_{2}$ and light? (Stereoisomers are not counted separately.)

Distinct hydrogens: the two terminal

CH X_{3}

of the ethyl groups (equivalent), the two

CH X_{2}

groups (equivalent), the single

CH

, and the branch

CH X_{3}

. That is four types of H, so four constitutional monochloro isomers.