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  5. The p-Block Elements-I / p-ब्लॉक के कुछ तत्व-I

12th Class Chemistry The p-Block Elements-I / p-ब्लॉक के कुछ तत्व-I Question Bank MCQs - The p-Block Elements

  • question_answer
    Nitrogen forms stable \[{{N}_{2}}\] molecule but phosphorus is converted to \[{{P}_{4}}\] from \[{{P}_{2}}\] because

    A) \[p\pi -p\pi \] bonding is strong in phosphorus

    B) \[p\pi -p\pi \]bonding is weak in phosphorus

    C) triple bond is present in phosphorus

    D) single P - P bond is weaker than N - N bond.

    Correct Answer: B

    Solution :

    \[p\pi -p\pi \] bonding in nitrogen is strong hence it can form triple bond with another N. Single N - N bond is weaker than P - P bond due to high interionic repulsion of non-bonding electrons. Hence, \[N\equiv N\]is stable and \[{{P}_{2}}\] is not.


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