question_answer

\[{{[Sc({{H}_{2}}{{O}_{6}})]}^{3+}}\]ion is

A)  colourless and diamagnetic

B)  coloured and octahedral

C)  colourless and paramagnetic

D)   coloured and paramagnetic

Correct Answer: A

Solution :

In\[{{[Sc{{({{H}_{2}}O)}_{6}}]}^{3+}}\],oxidation state of\[Sc\]is\[+3\]. \[\because \]\[S{{c}^{3+}}\]has no unpaired electrons. \[\therefore \]\[{{[Sc{{({{H}_{2}}O)}_{6}}]}^{3+}}\]is diamagnetic and-colourless,