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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3hx123

Which of the following statements about the conversion of alcohols into alkyl halides are correct?

  1. A2,2-Dimethylpropan-1-ol with conc. gives 1-bromo-2,2-dimethylpropane without any rearrangement
  2. B; both by-products are gases
  3. CWith Lucas reagent the rate of reaction follows the order tertiary secondary primary alcohol because of carbocation stability
  4. D

Answer: B, C, D

The first two equations are balanced and correct, and Lucas reactivity reflects carbocation stability. Neopentyl alcohol on protonation and loss of water would give a primary cation that rearranges by methyl shift to the tertiary cation, so the product is 2-bromo-2-methylbutane, not the unrearranged bromide. The last statement is false.
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