Which molecule has the longest bond length among those with a single bond?
HI has a single bond with a bond length of ~161 pm, longer than HF (92 pm), HCl (127 pm), or HBr (141 pm) due to larger atomic size.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Kossel-Lewis Approach and Octet Rule and Lewis Structures
