MCQ
Increasing order of acid strength of halogen acid is
  • $HF < HCl < HBr < HI$
  • B
    $HCl < HBr < HI < HF$
  • C
    $HF < HI < HBr < HCl$
  • D
    None of these

Answer

Correct option: A.
$HF < HCl < HBr < HI$
a
(a) As going down the group size increases, an liberation of ${H^ + }$ ion becomes easy. So the order of acidity is :

$HI > HBr > HCl > HF$

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