Which response includes all the following processes that are accompanied by an increase in entropy? 1. I2 (s) → I2 (g) 2. 2I (g) → I2(g) 3. 2NH3 (g) → N2(g) + 3 H2(g) 4. Mg2+(aq) + 2 OH-(aq) → Mg(OH)2(s) A. 1,2 B. 1,3 C. 3,4 D. 3 E. 2,4

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UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.