Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The maximum number of 90° angles between bond pair-bond pair (bp-bp) electrons is observed in molecules with $s{p}^3{d}^2$ hybridization, which corresponds to an octahedral geometry. This geometry has 12 such angles.

Let's analyze the options:

1. $s{p}^3{d}^2$ hybridization: Octahedral geometry, 12 angles of 90°.

2. $s{p}^{3}d$ hybridization: Trigonal bipyramidal geometry, 6 angles of 90° (3 axial-equatorial, 3 equatorial-axial).

3. $ds{p}^2$ hybridization: Square planar geometry, 4 angles of 90°.

4. $ds{p}^3$ hybridization: This is equivalent to $s{p}^{3}d$ hybridization, leading to trigonal bipyramidal geometry with 6 angles of 90°.

Therefore, $s{p}^3{d}^2$ hybridization has the maximum number of 90° angles.