Question

Which of the following molecules has no rotational spectrum?
A. NH3. B. HCl. C. N2. D. H2O. E. NO​

Answer 1

Answer:

N2 is the answer

Explanation:

Since homonuclear molecules such as dinitrogen (N2) have no dipole moment they have no rotation spectrum. Highly symmetric polyatomic molecules, such as carbon dioxide, also have no net dipole moment – the dipoles along the C-O bonds are always equal and opposite and cancel each other out.