J & K CET Engineering J and K - CET Engineering Solved Paper-2010

  • question_answer
    In \[\text{C}{{\text{O}}_{\text{2}}}\text{,C}{{\text{H}}_{\text{4}}}\]and\[\text{CH}_{\text{3}}^{\text{+}}\]the hybridisation of carbon atom are

    A)  \[s{{p}^{2}},s{{p}^{3}}\]and \[s{{p}^{2}}\]respectively

    B) \[~sp,s{{p}^{3}}\] and \[s{{p}^{2}}\]respectively

    C) \[~sp,\text{ }s{{p}^{3}}\] and \[sp\]respectively

    D)  \[s{{p}^{2}},\text{ }s{{p}^{3}}\]and \[sp\]respectively

    Correct Answer: B

    Solution :

     Number of hybrid orbitals, \[H=\frac{1}{2}[V+M-C+A]\] (Here,\[V=\]valence electrons, \[M=\]monovalent atom,\[C=\]positive  charge,  \[A=\]negative charge). In \[C{{O}_{2}},\] \[H=\frac{1}{2}[4+0-0+0]=2\] Thus, hybridisation is sp. In\[C{{H}_{4}},\] \[H=\frac{1}{2}[4+4-0+0]=4\] Thus, hybridisation is \[s{{p}^{3}}.\] In \[CH_{3}^{+},\] \[H=\frac{1}{2}[4+3-1+0]=3\] Thus, hybridisation is \[s{{p}^{2}}.\]


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