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  4. The most polar bond is

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Q. The most polar bond is

VMMC MedicalVMMC Medical 2007

Solution:

Key Idea: Greater the difference in electronegativity of bonded atoms, more will be polarity of bond. The bond is polar if the difference in electronegativity of bonded atoms is more than 1.7. The N?F bond is most polar because, it has highest difference in electronegativity among the bond atoms. The N?N bond is non-polar because the difference in electronegativity of atoms is zero.