A) \[HF\text{ }>\text{ }HCl\text{ }>\text{ }HBr\text{ }>\text{ }HI\]
B) \[HI\text{ }>\text{ }HBr\text{ }>\text{ }HCl\text{ }>\text{ }HF\]
C) \[HCl\text{ }>\text{ }HF\text{ }>\text{ }HBr\text{ }>\text{ }HI\]
D) \[HF\text{ }>\text{ }HBr\text{ }>\text{ }HCl\text{ }>\text{ }HI\]
Correct Answer: A
Solution :
Bond strength \[\propto \frac{1}{Bond\,length}\] Bond length Bond length : \[HI\text{ }>\text{ }HBr\text{ }>\text{ }HCl\text{ }>\text{ }HF\] Hence, Bond strength : \[HF\text{ }>\text{ }HCl\text{ }>\text{ }HBr\text{ }>\text{ }HI\] As we move down the group from F to I, the atomic size increases thus, the bond length (H - X) increases hence, the bond strength decreases from HF to HI.You need to login to perform this action.
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