а. The strong electrostatic attractions between cations and anions are responsible for the fact that most ionic compounds are solids at room temperature with high melting and high boiling points. However, ionic liquid is a salt that is a liquid at room temperature. Explain the phenomenon and provide a relevant application of the ionic liquids that would benefit us.

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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.