JEE Main Chemistry question

can be obtained in the laboratory by the action of ethyl alcohol with:

(A)KBr
(B)
(C)
(D)KBr and conc. Correct

Answer: (D)

Solution

Ethanol reacts with KBr in the presence of concentrated : the sulphuric acid first generates HBr in situ from KBr (KBr + H_2SO_4 \rightarrow KHSO_4 + HBr), and this HBr then substitutes the alcohol's to give ethyl bromide: $ + HBr

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Question ID VK-148162