1)

The reactivity of alkyl bromides

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 Towards iodide ion in dry acetone decrease to the order 


A) IV >I >II>III

B) I >IV >II >III

C) III > II > I >I

D) III >II > IV >1

Answer:

Option A

Explanation:

 In dry acetone  reaction follows $SN^{2}$ mechanism  

Hence, 

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