AIIMS 2019 Chemistry Hybridization MCQ Question

The ion [Cl₄]⁻ has a central chlorine atom that undergoes sp³d² hybridization, resulting in an octahedral geometry with six electron pairs (four bonding pairs and two lone pairs). In contrast, [Cl₂]⁻ involves only two chlorine atoms and does not require hybridization beyond sp³, while [IF₆]⁻, although having an octahedral shape, involves iodine and not chlorine. Lastly, [BrF₂]⁻ has a central bromine atom with sp³ hybridization, leading to a bent molecular shape, which does not utilize the d-orbitals necessary for sp³d² hybridization.