JEE Main levelSingle correct optionDifficulty 2 of 3nm267
How many different monochlorination products can the alkane shown give? Count constitutional isomers only and ignore stereoisomers.
A3
B4
C5
D6
Answer: B
The alkane is 2-methylbutane. Distinct hydrogen sets: the two equivalent methyls on C2, the C2 H, the CH2 and the terminal CH3: 4 sets, so 4 monochloro constitutional isomers.