Question

what do you mean by microwave inactive molecule​

Answer 1

Explanation:

Homonuclear diatomics are microwave inactive (e.g. O2, N2, etc.) In other words, a dipole must be present in the molecule for you to get a rotational spectrum.

Answer 2

Answer:

In other words, they cannot interact with microwave radiation and are said to be microwave inactive. Examples are all homonuclear diatomic molecules like H2, N2, O2, and F2. All tetrahedral and octahedral molecules like CH4 and SF6 are also microwave inactive, as are other symmetrical molecules like benzene.