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 \[+\,3.\] \[\because \] has no unpaired electrons; \[\therefore \]\[{{[Sc{{({{H}_{2}}O)}_{6}}]}^{3+}}\]is diamagnetic and colourless.