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J & K CET Engineering J and K - CET Engineering Solved Paper-2012

  • question_answer
    The effective  atomic  number  for \[{{[Rh{{({{H}_{2}}O)}_{6}}]}^{3+}}\](at. no. for Rh is 45) is

    A)  42               

    B)  45

    C)  48               

    D)  54

    Correct Answer: D

    Solution :

     The   effective   atomic   number   for \[{{[Rh{{({{H}_{2}}O)}_{6}}]}^{3+}}\](atomic no. of\[Rh=45\]) is 54. Because rhodium is in oxidation state \[x+6\times 0=+\,3\] \[x=+\,3\] \[R{{h}^{3+}}=45-3=42\,\] \[42+12\]electrons from 6 ligands \[({{H}_{2}}O)\] \[=54\]electrons.


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