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Q. The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as

MHT CETMHT CET 2017Haloalkanes and Haloarenes

Solution:

The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as Finkelstein reaction.
$C _{2} H _{5}- Br + NaI \rightarrow C _{2} H _{5} I + NaBr$
In dry acetone, sodium bromide gets precipitated.