Question

A $d$-subshell in an atom in the presence and absence of magnetic field is:

• A. five-fold degenerate, non-degenerate
• B. feven-fold degenerate, non-degenerate
• C. five-fold degenerate, five-fold degenerate
• D. non-degenerate, five-fold degenerate

Answer 1

The correct option is C five-fold degenerate, five-fold degenerate

d- subshell in the atom

$5m_l\Rightarrow$ degenerate orbitals in absence of magnetic field

In the presence of the magnetic field, splitting of orbitals occurs resulting in five-fold degenerate

$d_{xy},d_{yz},d_{zx},d_{x^2{y}^2},d_{z^2}$

Hence, the correct option is $\text{C}$