Question

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

Answer 1

It's (a) HF as the sizes of F and H are smaller which increases stability of acid and also the affinity is more the bond dissociation enthalpy is highest

Answer 2

Ans7wer:

Explanation:

F is higher affinity because smaller size but cl has higher dissociation enthalpy. Thus correct order Cl>F>Br>I

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