Which of the following compound has/have effective atomic number equal to the atomic…

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

Problem

Which of the following compound has/have effective atomic number equal to the atomic number of a noble gas ? (1)

\text{K}[\text{Co}(\text{CO})_4]

(2)

\text{K}_2[\text{Fe}(\text{CO})_4]

(3)

[\text{Co}(\text{NH}_3)_6]\text{Cl}_2

(4)

[\text{CoCl}_3(\text{H}_2\text{O})_3]