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NEET levelSingle correct optionDifficulty 1 of 3o2249

How many different monochlorination products (constitutional isomers only) can the alkane shown give with and light?

  1. A3
  2. B4
  3. C5
  4. D6

Answer: B

The alkane is methylcyclopentane. Its sets of equivalent hydrogens are the methyl group, the ring CH, the two C-2/C-5 methylenes and the two C-3/C-4 methylenes. Four sets give four constitutional monochloro products (ring stereoisomers are ignored).
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