Question

Increasing order of acid strength of halogen acid is

• A. $HF<HCl<HBr<HI$
• B. $HCl<HBr<HI<HF$
• C. $HF<HI<HBr<HCl$
• D. None of these

Answer 1

Answer: (A)

As going down the group size increases, a liberation of $H^{+}$ ion becomes easy. So the order of acidity is: $HI>HBr>HCl>HF$