Question

An s-orbital may combine with p-orbital provided that lobes of p-orbital are

• A. perpendicular to the axis joining the nuclei
• B. pointing along the axis joining the nuclei
• C. making an acute angle with the axis joining the nuclei
• D. making an obtuse angle with the axis joining the nuclei

Hint:

Maximum overlap = stronger bond. For s–p overlap, the p orbital lobe must point along the bond axis.

Answer 1

The Correct Option is B

Step 1: Recall orbital overlap condition.
Effective overlap occurs when orbitals are aligned along the internuclear axis (the line joining two nuclei).
Step 2: Application to s and p orbitals.
- The spherical s-orbital can overlap with a p-orbital lobe only if the lobe points along the axis joining the nuclei.
- If perpendicular, acute, or obtuse angle → poor or zero overlap.
Final Answer: \[ \boxed{\text{pointing along the axis joining the nuclei}} \]