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Standard XII
Chemistry
Physical Properties of Alcohols and Phenols
Question

The compound which reacts fastest with Lucas reagent at room temperature, is
  1. butan-1-ol
  2. butan-2-ol
  3. 2-methyl propan-1-ol
  4. 2-methyl propan-2-ol

A
butan-2-ol
B
2-methyl propan-1-ol
C
2-methyl propan-2-ol
D
butan-1-ol
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Solution
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Tertiary alcohol reacts fastest with Lucas reagent at room temperature.

2-methyl propan-2-ol is a tertiary alcohol, thus reacts immediately with Lucas reagent.

Hence, option D is correct.

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