Solveeit Logo
Login

Question

Chemistry Question on d -and f -Block Elements

Which one of the following shows maximum value of paramagnetic behaviour?

A

[Sc(CN)6]3−{{[Sc{{(CN)}_{6}}]}^{3-}}

B

[Co(CN)6]3−{{[Co{{(CN)}_{6}}]}^{3-}}

C

[Fe(CN)6]4−{{[Fe{{(CN)}_{6}}]}^{4-}}

D

[Cr(CN)6]3−{{[Cr{{(CN)}_{6}}]}^{3-}}

Answer

[Cr(CN)6]3−{{[Cr{{(CN)}_{6}}]}^{3-}}

Explanation

Solution

Calculate the oxidation state of central metal ion as that gives idea of about number of unpaired or paired electrons.
[Sc(CN)6]3−\left[ Sc ( CN )_{6}\right]^{3-}
Sc=21=1s2.2s2,2p6,3s2,3p6,4s2,3d1Sc =21=1 s^{2} .2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 4 s^{2}, 3 d^{1}
undefinedundefinedundefined

No unpaired electron hence, diamagnetic