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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+H^+ and I+I^+ . HF is weakest acid because of extensive hydrogen bonding H+ does not ionise freely.