Electrons should be filled in orbitals according to their increasing order of energy. This statement is related to .....

Consider the following statements:
$(a)$ Electron density in the $XY$ plane in $3d_{x^2-y^2}$ orbital is zero.
$(b)$ Electron density in the $XY$ plane in $3d_{z^2}$ orbital is zero.
$(c)$ $2s$ orbital has one nodal surface.
$(d)$ For $2p_z$ orbital,$YZ$ is the nodal plane.
Specify True or False.

Which of the following orbitals has two angular nodes?

Krypton $(_{36}Kr)$ has the electronic configuration $[Ar] 4s^2 3d^{10} 4p^6$. The $37^{th}$ electron will go into which of the following subshells?

Which of the following sets of orbitals may degenerate?

Match the $LIST$-$I$ with $LIST$-$II$:

List-$I$ (Orbital)	List-$II$ (Radial nodes and nodal plane)
$A$. $2s$	$I$. $1$ Radial node + two nodal planes
$B$. $3s$	$II$. $1$ Radial node + one nodal plane
$C$. $3p$	$III$. $2$ Radial nodes + No nodal plane
$D$. $4d$	$IV$. $1$ Radial node + No nodal plane