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Ethyl alcohol reacts at a faster rate with HI than with HCl in forming the corresponding ethyl halides under identical conditions mainly because -

Option: 1

HI, being a stronger acid, protonates ethyl alcohol at oxygen much better and helps substitution

Option: 2

the bond length in HI is much shorter than that in HCl

Option: 3

I- is a much better leaving group


Option: 4

I- is a much better nucleophile than Cl-

Answers (1)



Order of reactivity of halogen acids -


- wherein

ROR'+HX\rightarrow ROH+R'X


I- is a much better nucleophile than Cl-.

Therefore, Option(4) is correct.

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