Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the halogen acids should have highest bond dissociation enthalpy ?
A. HF
B. HCl
C. HBr
D. HI

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1 Answers

Correct Answer - A
HF has the highest bond dissociation enthalpy (`574 " kJ mol"^(-1))` due to smallest bond length and presence of intermolecular hydrogen bonding.

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