JEE MAIN - Chemistry (2020 - 8th January Morning Slot - No. 11)
The decreasing order of reactivity towards dehydrohalogenation (E1) reaction of the following compounds is :
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B $$>$$ D $$>$$ A $$>$$ C
D $$>$$ B $$>$$ C $$>$$ A
B $$>$$ A $$>$$ D $$>$$ C
B $$>$$ D $$>$$ C $$>$$ A
Explanation
Dehydrohalogenation of the given halides by E1
mechanism is decided by the stability of
carbocation formed in the first step. The
correct decreasing order of the given halides
towards dehydrohalogenation by E1 mechanism
is
D $$>$$ B $$>$$ C $$>$$ A
D $$>$$ B $$>$$ C $$>$$ A
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