Question

The lowest value of paramagnetism is shows by

• A. $\lbrack Co(CN)_{6}\rbrack^{3 -}$
• B. $\lbrack Fe(CN_{6})\rbrack^{3 -}$
• C. $\lbrack Cr(CN)_{6}\rbrack^{3 -}$
• D. $\lbrack Mn(CN)_{6}\rbrack^{3 -}$

Answer 1

Answer: (A)

$\lbrack Co(CN)_{6}\rbrack^{3 -}$

Answer 2

Electronic configurations of $Co^{3 +} = 3d^{6}$

$\lbrack Co(CN)_{6}\rbrack^{3 -}$

No. of unpaired electrons = 0.

Hence, shows no paramagnetism.