Question

The pair of orbitals with electron density maximum along the axes is

• A. $d_{xy}, d_{yz}$
• B. $d_{z^2}, d_{x^2-y^2}$
• C. $d_{xz}, d_{z^2}$
• D. $d_{xz}, p_z$

Hint:

Axial orbitals have squares in their name: $x^2, y^2, z^2$.

Answer 1

The Correct Option is B

Step 1: Concept
The five d-orbitals are split into two groups based on their orientation: $t_{2g}$ (between axes) and $e_g$ (along axes).

Step 2: Meaning
$d_{xy}, d_{yz}, d_{xz}$ have lobes between the coordinate axes.

Step 3: Analysis
$d_{x^2-y^2}$ has lobes exactly along the X and Y axes, and $d_{z^2}$ has its maximum density along the Z-axis.

Step 4: Conclusion
Thus, the pair $d_{z^2}, d_{x^2-y^2}$ consists of the axial orbitals.
Final Answer: (B)