61.
Decreasing order of reactivity of hydrogen halide acid in
the conversion of ROH - RX
(A)
HCI> HBr > HI > HF
HI > HBr > HCI> HF
(C)
(D)
HF > HCI> HBr > HI
HF > HBr > HI >HC1
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Answer: pata nahi dude
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