Email: bbcnoun@gmail.com Whatsapp: 08131667008 CHM391 Question: Which of these is not part of the three regions of infrared? Answer: [C] close Question: When a molecule absorbs radiation at the infrared region, it causes the molecule to undergo Answer: [D] vibrational transitions Question: When molecules absorb radiation at the infrared region, the energy of the wavelength absorbed causes a vibrational transition if the energy absorbed is equal to the quantized jump in the _________.\n Answer: [D] internal energy Question: The measure of the fraction of light radiation that is absorbed by a given\nsample solution is known as ________. Answer: [B] Absorbance Question: Typical units of frequency used in IR spectra is Answer: [B] wave number Question: The vibrational energy of the atoms or groups of atoms\nwithin the molecule is raised to a higher level on absorption of Answer: [A] infrared radiation Question: Molecular transitions occur only at _________wavelengths. Answer: [B] definite Question: Which of the following may not occur when a molecule absorbs electromagnetic radiation? Answer: [D] Gibb\'s free energy Question: Charge transfer transitions is evident in the _______of metal chelates Answer: [B] intense colour Question: Same proportion of incident light is absorbed per unit thickness\nirrespective of its intensity, and that each successive unit layer absorbs the same proportion of light falling on it. This is Answer: [B] Lambert\'s law