Q. Match the compounds given in List I with the oxidation state of cobalt present in it given in List II and select the correct answer using the code given below the lists:

List I (Compounds) List II (Oxi. state of Co)

P. $[C o (NCS) (N H_{3})_{5}] S O_{3}$ 1. +4

Q. $[C o (N H_{3})_{4} C l_{2}] S O_{4}$ 2. -1

R. $N a_{4} [C o (S_{2} O_{3})_{3}]$ 3. +2

S. $K [C o (CO)_{4}]$ 4. +3

P Q R S

2417 203 Coordination Compounds Report Error

4132

Solution: