Question

WHICH OF THE FOLLOWING MOLECULES WILL SHOW A MICROWAVE ROTATIONAL SPECTRUM AND WHY??
H2, HCl, CH2Cl, CH2Cl2, H2O, SF6
pls explain for all the molecules ​

Answer 1

Answer:

its HCL

because , Selection rules only permit transitions between consecutive rotational levels: ΔJ=J±1, and require the molecule to contain a permanent dipole moment. Due to the dipole requirement, molecules such as HCl have pure microwave rotational spectrum