Q. Order of reactivity of halogen acids towards an alcohol is
A) HCl > HBr > HI
B) HBr > HI > HCl
C) HI > HBr > HCl
D) HI > HCl > HBr
Explanation
(c)
Longer the bond length, lesser will be dissociation energy and hence, more reactivity.
Among halogen acids bond length increases from HCl to HI.
$\therefore$ Order of reactivity of halogen acids towards alcohol is
HI > HBr > HCl
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.