A) \[[Pt{{(N{{H}_{3}})}_{4}}][PtC{{l}_{6}}]\]
B) \[[Pt{{(py)}_{4}}][PtC{{l}_{4}}]\]
C) \[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{2}}][PtC{{l}_{4}}]\]
D) \[{{K}_{4}}[Ni{{(CN)}_{6}}]\]
Correct Answer: B
Solution :
Let the oxidation state of \[Pt\]is\[x\]. \[[Pt{{(py)}_{4}}][PtC{{l}_{4}}]\] \[x+0\times 4+x+(-1)\times 4=0\] \[2x=4\] \[\Rightarrow \] \[x=+2\] Thus, it is the complex in which the central metal atom, \[Pt\] in cationic and amionic parts has same oxidation state.
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