A) \[[Cu\,{{(N{{H}_{3}})}_{4}}]\,S{{O}_{4}}\] and \[{{K}_{3}}\,[Fe\,{{(CN)}_{6}}]\]
B) \[{{K}_{4}}\,[Fe\,{{(CN)}_{6}}]\] and \[[Co\,{{(N{{H}_{3}})}_{6}}]\,C{{l}_{3}}\]
C) \[{{K}_{3}}\,[Cr\,{{({{C}_{2}}{{O}_{4}})}_{3}}]\] and \[[Ni\,{{(CO)}_{4}}]\]
D) all of these
Correct Answer: D
Solution :
| [a] \[{{[Cu\,{{(N{{H}_{3}})}_{4}}]}^{2+}}=29-2+8=35\] |
| \[{{[Fe\,{{(CN)}_{6}}]}^{3\,-}}=26-3+12=35\] |
| [b] \[{{[Fe\,{{(CN)}_{6}}]}^{4\,-}}=26-2+12=36\] |
| \[{{[Co\,{{(N{{H}_{3}})}_{6}}]}^{3\,-}}=27-3+12=36\] |
| [c] \[{{[Cr\,{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3\,-}}=27-3+12=36\] |
| \[[Ni\,{{(CO)}_{4}}]=28+8=36\] |
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