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Lucas reagent is conc. HCl + anhyd. ZnCl2.

1. CH3CH2OH reacts with Lucas reagent to form CH3CH2Cl.
2. CH3CH2OH reacts faster than CH3CH(OH)CH3.
3. CH3CH2OH reacts slower than CH3CH(OH)CH3.
4. CH3CH2OH reacts with Lucas reagent to form CH3CH2Br.

Correct answer: CH3CH2OH reacts slower than CH3CH(OH)CH3.

Solution

Lucas reagent distinguishes alcohols based on their reactivity. Secondary alcohols like CH3CH(OH)CH3 react faster than primary alcohols like CH3CH2OH due to the stability of the carbocation intermediate.

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