Question

Consider the following statement
I) Splitting of spectral lines in magnetic field is due to the presence of degenerate orbitals
II) In presence of electric field energy value of $P_x,P_y$ and $P_z$ of same orbit are different
III) Degenerate orbitals differs only in their orientation
The correct combination is:

• A. I,II
• B. II,III
• C. I,II,III
• D. I,III

Answer 1

Answer: (C)

I,II,III

In presence of magnetic field and electric field, the degeneracy between the orbitals gets broken.
Therefore splitting of spectral lines takes place. This is known as the Stark effect and Zeeman effect.
Also, degenerate orbitals are those orbitals which have the same energy.
For an atom,
degenerate orbitals have same l value but different m value i.e. they differ in orientation.