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JEE Main levelSingle correct optionDifficulty 2 of 3ap025

Which order correctly gives decreasing rate of reaction with / at room temperature?

  1. Abutan-1-ol > butan-2-ol > 2-methylpropan-2-ol
  2. B2-methylpropan-2-ol > butan-2-ol > butan-1-ol
  3. Cbutan-2-ol > 2-methylpropan-2-ol > butan-1-ol
  4. D2-methylpropan-2-ol > butan-1-ol > butan-2-ol

Answer: B

The reaction proceeds through carbocation character, so the rate order is tertiary > secondary > primary: 2-methylpropan-2-ol > butan-2-ol > butan-1-ol.
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