Which of the following is most volatile?

Question

Which of the following is most volatile? (A)  HF  (B)  HCl  (C)  HBr  (D)  HI

Tardigrade Admin · Accepted Answer

The bond strength of H-X decreases from HF to HI because the dissociation energy of H-X bond decreases from HP to HI. Hydrogen halide: H-F H-Cl HBr HI Dissociation energy: 566 431 366 299 (kJ mol-1)

Q. Which of the following is most volatile?

$H F$

$H Cl$

$H B r$

$H I$

The bond strength of $H - X$ decreases from HF to HI because the dissociation energy of $H - X$ bond decreases from HP to HI. Hydrogen halide : $H - F$ $H - Cl$ $H B r$ $H I$ Dissociation energy: 566 431 366 299 $(k J m o l^{- 1})$