| Assertion : Amongst the compounds, |
| \[{{H}_{2}}C=CHC{{H}_{2}}OH\](I), \[{{C}_{6}}{{H}_{5}}OH\](II) |
| \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH\](III), \[{{\left( C{{H}_{3}} \right)}_{3}}COH\](IV) |
| only (IV) reacts with Lucas reagent at room temperature. |
| Reason : Tertiary alcohol gives turbidity immediately with Lucas reagent. |
A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement.
D) Assertion is wrong statement but reason is correct statement.
Correct Answer: D
Solution :
The order of reactivity of alcohols towards Lucas reagent is \[3{}^\circ \] alcohol \[>\text{ }2{}^\circ \] alcohol \[>\text{ }1{}^\circ \] alcohol. \[1{}^\circ \] alcohols do not react with Lucas reagent at room temperature. It requires high temperature. The benzyl and allyl alcohols react as rapidly as \[3{}^\circ \] alcohols with Lucas reagent because their cations are resonance stabilised.
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