KVPY Sample Paper KVPY Stream-SX Model Paper-20

  • question_answer
    In which of the following molecular shape \[d_{z}^{2}-\] orbital must not be involved in bonding?

    A) Pentagonal planar

    B) Trigonal planar

    C) Linear

    D) Square planar

    Correct Answer: B

    Solution :

    [a] Pentagonal planar \[\to s{{p}^{3}}{{d}^{3}}[s+{{p}_{x}}+{{p}_{y}}+{{p}_{z}}+{{p}_{{{x}^{2}}-{{y}^{2}}}}+{{d}_{{{z}^{2}}}}+{{d}_{xy}}]\]
    [b] Trigonal planar\[\to s{{p}^{2}}[s+Any\,twoP]\]
    [c] Linear\[\,\to sp[s+any\,one\,p]\]
                  \[\to s{{p}^{2}}[s+any\,two\,p]\]
                  \[\to s{{p}^{3}}[s+{{p}_{x}}+{{p}_{y}}+{{p}_{z}}]\]
                   \[\to s{{p}^{3}}d[s+{{p}_{x}}+{{p}_{y}}+{{p}_{z}}+{{d}_{{{z}^{2}}}}]\]
    [d] Square planar \[\to s{{p}^{3}}{{d}^{2}}[s+{{p}_{x}}+{{p}_{y}}+{{p}_{z}}+{{d}_{{{x}^{2}}-{{y}^{2}}}}+{{d}_{{{z}^{2}}}}]\]


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