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Which of the following compounds reacts immediately with Lucas reagent? (A) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$ (B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$(C) \(C{{H}_{3}}-\underset{\underset{OH}{\mathop |}\,}{\mathop{CH}}\,-C{{H}_{3}}\)(D)\(C{{H}_{3}}-\underset{\underset{OH}{\mathop{\text{ }|}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\)
Which of the following compounds reacts immediately with Lucas reagent? (A) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$ (B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$(C) \(C{{H}_{3}}-\underset{\underset{OH}{\mathop |}\,}{\mathop{CH}}\,-C{{H}_{3}}\)(D)\(C{{H}_{3}}-\underset{\underset{OH}{\mathop{\text{ }|}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\)
Chemistry
Which of the following compounds reacts immediately with Lucas reagent? (A) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$ (B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}$(C) \(C{{H}_{3}}-\underset{\underset{OH}{\mathop |}\,}{\mathop{CH}}\,-C{{H}_{3}}\)(D)\(C{{H}_{3}}-\underset{\underset{OH}{\mathop{\text{ }|}}\,}{\mathop{\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\)

Correct option is D

Explanation:

A solution of anhydrous zinc chloride in strong hydrochloric acid is known as Lucas reagent. This solution is used to classify low-molecular-weight alcohols. The reaction is a substitution in which a hydroxyl group is replaced by a chloride group.
Tertiary alcohols react almost instantly with lucas reagent, forming the most stable tertiary carbocations. Turbidity is seen in seconds.
As a result, option D is the proper answer.

i

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