Question

Consider the isomers of hydrocarbon with molecular formula \(C_5H_{10}\). These isomers do not decolourise \(KMnO_4\) solution. These isomers are subjected to chlorination with chlorine in presence of light to give monochloro compounds. The total number of monochloro compounds (structural isomers only) formed is ______.}

Answer 1

Correct Answer: 8

Concept: If \(C_5H_{10}\) does not decolourise \(KMnO_4\), it must be a cycloalkane. Possible cycloalkane isomers:

• Cyclopentane
• Methylcyclobutane
• Ethylcyclopropane
• Dimethylcyclopropane

Step 1:Monochloro derivatives}

• Cyclopentane → 1
• Methylcyclobutane → 3
• Ethylcyclopropane → 3
• Dimethylcyclopropane → 1

Step 2:Total} \[ 1 + 3 + 3 + 1 = 8 \] \[ \boxed{8} \]