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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.

  1. A3
  2. B4
  3. C5
  4. 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.
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