Cr ( CO )_x , find the value of x ?

Step-by-step solution

Here, Cr has zero oxidation state, as has zero oxidation state in the compound. So, at zero oxidation state the electronic configuration of Cr is [ Ar ] 4 s^1, 3 d^5 that means Cr has 6 valencies, as Cr in this state is stable due to half-filled orbitals. Now, for 6 valencies, 6 CO is required. Therefore, x=6 The compound is Cr ( CO )₆ . Hence, the correct option is (2).