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  5. Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति

JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Sample Paper Topic Test - Periodic Table

  • question_answer
    The gaseous HX molecule has a measured dipole moment of 4.0 D, which indicates that it is a very polar molecule. The separation between the nuclei in this molecule is \[2.67\times {{10}^{-8}}cm\] then the percentage ionic character in HX molecule:

    A) 78%

    B) 31.25%

    C) 50.25%

    D) None of these

    Correct Answer: B

    Solution :

    [b] Dipole moment of compound would have been completely ionic \[=(4.8\times {{10}^{-10}}esu)\,(2.67\times {{10}^{-8}}\,cm)=12.8\,D\] so % ionic character \[=\frac{4.0}{12.8}\times 100%=31.25%\]  


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