Question

Which of the following sets are not correctly matched? \[ \text{Molecule} \quad \text{Hybridization} \] \[ (i) \, \text{XeF}_4 \quad \text{dsp}^2 \quad (ii) \, \text{BrF}_5 \quad \text{sp}^3d^2 \quad (iii) \, \text{PF}_5 \quad \text{sp}^3d \quad (iv) \, \text{SF}_4 \quad \text{sp}^3 \]

• A. i, iii only
• B. ii, iv only
• C. i, iv only
• D. iii, iv only

Hint:

The hybridization depends on the number of electron pairs and bonding in the molecule. Molecules with 5 regions of electron density generally have \( \text{sp}^3d \) or \( \text{sp}^3d^2 \) hybridization.

Answer 1

The Correct Option is D

Step 1: Analyze the hybridization:
- \( \text{XeF}_4 \) is square planar and has \( \text{dsp}^2 \) hybridization, which is correct.
- \( \text{BrF}_5 \) has \( \text{sp}^3d^2 \) hybridization, which is correct.
- \( \text{PF}_5 \) has \( \text{sp}^3d \) hybridization, which is correct.
- \( \text{SF}_4 \) has \( \text{sp}^3d \) hybridization, not \( \text{sp}^3 \), which is incorrect.
Thus, the correct answer is option (4).