Arrange the following in decreasing order of their bond length: $HF, HCl, HBr, HI$. Provide the reason.
(A) The decreasing order of bond length is: $HI > HBr > HCl > HF$.
Reason: As the size of the halogen atom increases from $F$ to $I$,the bond length increases. Therefore,$HI$ has the longest bond length and $HF$ has the shortest bond length.
Reason: As the size of the halogen atom increases from $F$ to $I$,the bond length increases. Therefore,$HI$ has the longest bond length and $HF$ has the shortest bond length.
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