Chemistry - Coordination Chemistry Question with Solution | TestHub

Question Explanation:

Select correct statements for the colour of complex

Concept:

CFT

Solution:

${\mathrm{Sc}}^{3+}\to \left[{}_{18}\mathrm{Ar}\right]3{\mathrm{d}}^{0}4{\mathrm{s}}^0$ contain no unpaired ${\mathrm{e}}^{-}$so, $\mathrm{d}-\mathrm{d}$ transition is not possible but for ${\mathrm{Ti}}^{3+}\to [\mathrm{Ar}]3{\mathrm{d}}^1\mathrm{d}-\mathrm{d}$ transition is possible. Therefore, ${\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ is coloured but ${\left[\mathrm{Sc}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ is colourless.

Final Answer :A