A molecule with the formula \({\mathrm{AX}}_{4}\mathrm{Y}\)has all it's elements from p-block. Element A is rarest, mono…
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A molecule with the formula \({\mathrm{AX}}_{4}\mathrm{Y}\)has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y. Elements X and Y have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is :
[JEE Main 2025, 2 Apr (Shift 1)]
✓ Correct answer: a)
Square pyramidal
Explanation
X = F (highest electronegativity)
Y = O (second highest)
A = Tl (rarest, lowest IE in group 13)
\({\mathrm{AX}}_{4}\mathrm{Y}\) → 5 bond pairs, no lone pair → square pyramidal
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