Question

The correct order of acidic strength of halogen acids is:

• A. HI < HCl < HBr < HF
• B. HF <HCl < HBr < HI
• C. HF < HBr < HI < HCl
• D. HI < HBr < HCl < HF

Answer 1

The correct option is B

HF <HCl < HBr < HI

The acidic strength of these acids varies in the order: HF < HCl < HBr < HI.

The stability of these halides decreases down the group due to decrease in bond (H–X) dissociation enthalpy.