A) \[C{{H}_{3}}Cl>C{{H}_{3}}Br>C{{H}_{3}}I,\]
B) \[C{{H}_{3}}I>C{{H}_{3}}Br>C{{H}_{3}}Cl\]
C) \[C{{H}_{3}}Br>C{{H}_{3}}I>C{{H}_{3}}Cl\]
D) \[C{{H}_{3}}Br>C{{H}_{3}}Cl>C{{H}_{3}}I\]
Correct Answer: B
Solution :
Order of electro negativities of halogens are \[F>Cl>Br>I\]. Hence, the order of reactivities of methyl halide in the formation of Grignard reagent is \[C{{H}_{3}}I>C{{H}_{3}}Br>C{{H}_{3}}Cl\].
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