Which of the following pair the EAN of central metal atom is not same?

CHEMISTRY · Single correct · CBSE · Chemistry · Coordination Compounds · Coordination Compounds

Problem

Which of the following pair the EAN of central metal atom is not same? (1)

[\text{Fe}(\text{CN})_6]^{3-}

(2)

[\text{Cr}(\text{NH}_3)_6]^{3+}

(3)

[\text{FeF}_6]^{3-}

(4)

[\text{Ni}(\text{CO})_4]