The order of reactivity of following alcohols with halogen acids is

(i) (A) > (B) > (C)

(ii) (C) > (B) > (A)

(iii) (B) > (A) > (C)

(iv) (A) > (C) > (B)

<p><span data-teams="true">This is a multiple choice answer as classified in NCERT Exemplar</span></p><p><span data-teams="true">The Correct Answer is Option (ii). Haloalkanes are made by combining alcohols with halogen acids, in which the hydroxyl group of the alcohol is replaced by the halogen. Primary, secondary, and tertiary alcohols are represented by options (A), (B), and (C). Tertiary alcohols are more reactive than secondary and primary alcohols, and they generate haloalkanes from haloacids without the need of catalysts at ambient temperature. Alcohols have a reactivity order of <strong>3</strong><strong>? </strong><strong>&gt;2</strong><strong>? </strong><strong>&gt;1</strong><strong>? </strong>. As a result, the proper option is (ii).</span></p>

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