Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of $\mathrm{M}^{n^{+}}$ion are provided below; their $\lambda_{\max }$ values are marked as A , B and C respectively. The correct match between the complexes and their $\lambda_{\max }$ values is
(i) $\left[\mathrm{M}(\mathrm{NCS})_6\right]^{(-6+n)}$
(ii) $\left[\mathrm{MF}_6\right]^{(-6+\mathrm{n})}$
(iii) $\left[\mathrm{M}\left(\mathrm{NH}_3\right)_6\right]^{\mathrm{n}+}$
Select the correct option:
A
A-(i), B-(ii), C-(iii)
B
A-(ii), B-(iii), C-(i)
C
A-(ii), B-(i), C-(iii)
D
A-(iii), B-(i), C-(ii)
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
$$
\left(\lambda_{\max }\right) C>\left(\lambda_{\max }\right) B>\left(\lambda_{\max }\right) A
$$
From spectrochemical series
$$
\begin{aligned}
& \mathrm{F}-<\mathrm{NCS}-<\mathrm{NH}_3 \\
& \Rightarrow \mathrm{~A}-\mathrm{iii}, \mathrm{~B}-\mathrm{i}, \mathrm{C}-\mathrm{ii}
\end{aligned}
$$
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