- The possible j values for an f-electron according to Russell-Saunder's coupling are: - 7/2 and 5/2 only * 3/2,5/2 and 7/2 only - 1/2 and 3/2 only - None of the above * 1/2,3/2 and 5/2 only - The wavelength of the light that is required to excite rotation in molecules is in which range of the electromagnetic radiation? * Microwave range * VIS range * Between IR and VIS * UV range - Which one of the following pairs of molecules is vibrationally IR active/rotationally Raman inactive? N2/SF6 SF6/H2 - CO2/CH4 N2/NH3 CCl4/H2