Question

Simplified absorption spectra of three complexes $((i),(ii)$ and $(iii))$ of $M^{n+}$ 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) ${\left[M(NCS{)}_6\right]}^{(-6+n)}$
(ii) ${\left[M{F}_6\right]}^{(-6+n)}$
(iii) ${\left[M{\left(N{H}_3\right)}_6\right]}^{n+}$

• A. $A-(ii),B-(i),C-(iii)$
• B. $A-(iii),B-(i),C-(ii)$
• C. $A-(ii),B-(iii),C-(i)$
• D. $A-(i),B-(ii),C-(iii)$

Answer 1

Answer: (B)

Strength of ligand $F^{-}<NC{S}^{-}<N{H}_3$



As given in graph $:A<B<C\left({\lambda }_{\max }\right)$

$\therefore$ Correct matching is $A-(iii),B-(i),C-(ii)$