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Which of the follwing undergoes fastest dehydrohalogention ?A. `CT_(3)CH_(2)I`B. `CD_(3)CH_(2)I`C. `CH_(3)CH_(2)I`D. All are equally reactive

Answer» Correct Answer - C
`E2` elimination shows a large hydrogen isotope effect. The heavier the isotope, the slower the reaction. Therefore, the order of decreasing reactivity is `3 gt 2gt 1`.


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