HI is a better reagent than HBr for cleavage of ether. Explain.

Explanation

HI is a stronger acid than HBr and therefore, axonium ion is readily formed. `I^(-)` is also a better nucleophile than `Br^(-)` for nucleophilic substitution reaction.
`R-underset("Ether") underset(* *) overset(* *)O-R+HI to R underset("Oxonium ion") underset(H) underset(|) overset(+) overset(* *)O-R+I^(-),R-overset(* *^(+))underset(H) underset(|)O-R+I^(-)overset("Alcohol") to R-I+R-O-H`