Question

Match the following:

List – 1 Color	List – 2 elements
Prussian blue	${[Fe{(CN)_5}NOS]^{4 - }}$
Violet	$F{e_4}{[Fe{(CN)_6}]_3}$
Blood red	${[Fe(SCN)]^{2 + }}$
colorless	$AgCl$
$N{a_4}[Fe{(CN)_6}]$

Answer 1

An element is a pure substance made up entirely of atoms with the same number of protons in their atomic nuclei, as defined by chemistry. Chemical elements, unlike chemical compounds, cannot be broken down chemically into simpler molecules.

Complete answer:
Color of a chemical - Chemical color is a physical feature that results from the excitation of electrons caused by the chemical's energy absorption. The complementary color resulting from the elimination of the absorbed wavelengths is what is seen by the eye, not the color absorbed. Atomic spectroscopy was the first to notice this spectral view.
Spectroscopy is a term used to describe the study of chemical structure using energy absorption and release.
Spectroscopy - The study of the interaction between matter and electromagnetic radiation as a function of the radiation's wavelength or frequency is known as spectroscopy.
In simpler terms, spectroscopy is the precise study of color as it applies to all bands of the electromagnetic spectrum, including visible light.
Indeed, spectroscopy began as a study of the wavelength dependence of visible light dispersed by a prism absorption by gas phase materials.
Radiative energy includes matter waves and acoustic waves, and gravitational waves have recently been linked to a spectral signature in the context of the Laser Interferometer Gravitational-Wave Observatory.
Prussian blue – $F{e_4}{[Fe{(CN)_6}]_3}$
Violet – ${[Fe{(CN)_5}NOS]^{4 - }}$
Blood red – ${[Fe(SCN)]^{2 + }}$
Colorless - $AgCl$
So, the final answer is (A-2), (B-1), (C-3), (D-4).

Note:
All atoms and molecules can absorb and release energy in the form of photons, which is accompanied by a quantum state transition. The difference between the energies of the two quantum states is the amount of energy absorbed or released. There are many other kinds of quantum states, such as the rotational and vibrational states of a molecule.