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NEET Sample Paper NEET Sample Test Paper-77

  • question_answer
    Werner's theory was the first successful theory, which explained the properties of complexes. According to Werner's theory the primary and secondary valence of \[[Co\,C{{l}_{3}} {{\left( N{{H}_{3}} \right)}_{3}}C{{l}_{3}}\] is

    A) 3 and 3 respectively      

    B) 6 and 6 respectively

    C) 3 and 6 respectively      

    D) 6 and 3 respectively

    Correct Answer: C

    Solution :

    According   to Werner?s theory primary valence means oxidation state and secondary valance means coordination number. Let oxidation state of \[\operatorname{Co} in [CoC{{l}_{3}} {{\left( N{{H}_{3}} \right)}_{3}}\,C{{l}_{3}}\] is       \[x - 3+ 0 =+ 3\]\[x=0\] \[\therefore \,\,\,\,\,\,\,\,Primary valence = 3\] \[Secondary valence = coordination numbers =6\]


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