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Chemistry Question on coordination compounds

[Sc(H2O)6]3+[Sc(H_2O)_6 ]^{3+} ion is

A

colourless and diamagnetic

B

coloured and octahedral

C

colourless and paramagnetic

D

coloured and paramagnetic

Answer

colourless and diamagnetic

Explanation

Solution

[Sc(H2O)6]3+[Sc(H_2O)_6 ]^{3+},oxidation state of Sc is + 3. ∵ Sc3+\because\, Sc^{3+} has no unpaired electrons. ∴[Sc(H2O)6]3+\therefore [Sc(H_2O)_6]^{3+} is diamagnetic and colourless.