A) \[HF\]
B) \[HCl\]
C) \[HBr\]
D) \[HI\]
Correct Answer: A
Solution :
The strength of an acid depends upon its degree of ionisation which in turn, depends upon the bond energy thus, higher the bond dissociation energy lower is the degree of ionisation and hence, weaker Is the acid. Bond dissociation energies of the halogen acids increases in the order \[HI<HBr<HCl<HF\] Therefore, strength of the acid increases in the order \[HF<HCl<HBr<HI\]
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