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# The primary valency of 'Fe' in complex $K_4[Fe(CN)_6]$ is

$(a)\;2\qquad(b)\;3\qquad(c)\;6\qquad(d)\;4$

Can you answer this question?

The primary valency of 'Fe' in complex $K_4[Fe(CN)_6]$ is 2.
Hence (a) is the correct answer.
answered Jan 31, 2014