Question

The order of reactivity of halogen acids for reaction with $C_2{H}_{5}OH$ is

• A. HCl > HBr > HI
• B. HI > HBr > HCl
• C. HBr > HI > HCl
• D. HBr > HCl > HI.

Answer 1

Answer: (B)

The reactivity of HX depends upon the ease of dissociation of HX, i.e., bond dissociation energy of HX which increases as HI < HBr < HC1.