question_answer

\[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\] and \[{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{4-}}\] differ in:

A) geometry, magnetic moment

B) geometry, hybridization

C) magnetic moment, colour

D) hybridization, number of d-electrons

Correct Answer: C

Solution :

[c] \[F{{e}^{2+}}in{{\left[ Fe{{({{H}_{2}}O)}_{6}} \right]}^{2+}}\] Colour: Pale green\[\mu =4.9\text{ }B.M\].; octahedral \[F{{e}^{2+}}in{{\left[ Fe{{(CN)}_{6}} \right]}^{4-}}\] Colour: Yellow;\[\mu =0\]; octahedral