Question
Which one of the following forms a colourless solution in aqueous medium?(a) $\mathrm{Fe}^{+2}$(b) $\mathrm{Cr}^{3+}$(c) $\mathrm{Mn}^{+2}$(d) $\mathrm{Zn}^{2+}$
Step 1
When these ions are in solution, they can absorb light of certain wavelengths, which corresponds to the energy difference between the d-orbitals. The absorbed light is then re-emitted as visible light, giving the solution its color. Show more…
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