Question

classify the following molecules as microwave active or microwave inactive and state reason in each case,NO,Br2,N2O,XeF2

Answer 1

NO and XeF2 are active 

According to the gross selection rule, the molecule must possess a permanent dipole moment for a rotational transition in the microwave spectroscopy.

Answer 2

Explanation:

 Out of all the molecules given, only NO ( nitric oxide) and HBr ... Homonuclear molecules are not microwave active so I2 is inactive, CO2 and CS2 

➢H-H and Cl-Cl don't give rotational spectrum (microwave inactive). Which of the following molecules would show rotational spectrum: Br2 , HBr and CS2