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JEE Main levelSingle correct optionDifficulty 2 of 3nm135

Which pair consists of metamers?

  1. Abutan-1-ol and 2-methylpropan-1-ol
  2. Bdiethylamine and N-methylpropan-1-amine
  3. Cbutan-1-ol and butan-2-ol
  4. Dpropan-1-amine and trimethylamine

Answer: B

Metamers are isomers with different alkyl groups on the same polyvalent atom of the same functional group. Diethylamine and N-methylpropan-1-amine are both secondary amines with the groups (ethyl, ethyl) versus (methyl, propyl). The other pairs are chain, position and functional isomers respectively.
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