Question Bank › Inorganic Chemistry › Coordination Chemistry › ABC26IN0408ABC26IN0408 · Coordination Chemistry Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Hard
The correct order of increasing intensity (molar absorptivity) of the UV-visible absorption bands for the ions $\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+},\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+},\left[\mathrm{CrO}_{4}\right]^{2-}$, and $\left[\mathrm{NiCl}_{4}\right]^{2-}$ is
(a) $\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}<\left[\mathrm{NiCl}_{4}\right]^{2-}<\left[\mathrm{CrO}_{4}\right]^{2-}<\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
(b) $\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}<\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}<\left[\mathrm{CrO}_{4}\right]^{2-}<\left[\mathrm{NiCl}_{4}\right]^{2-}$
(c) $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}<\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}<\left[\mathrm{NiCl}_{4}\right]^{2-}<\left[\mathrm{CrO}_{4}\right]^{2-}$
(d) $\left[\mathrm{NiCl}_{4}\right]^{2-}<\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}<\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}<\left[\mathrm{CrO}_{4}\right]^{2-}$
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