Question
Chemistry Question on Group 17 Elements
The correct order of acidic strength is
A
HF < HCl < HBr < HI
B
HBr < HCl < HI < HF
C
HCl < HBr < HF < HI
D
HI < HBr < HCl < HF
Answer
HF < HCl < HBr < HI
Explanation
Solution
HI is most acidic due to weak bonding between H and I. It breaks into H+ and I+ . HF is weakest acid because of extensive hydrogen bonding H+ does not ionise freely.