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Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE
हिन्दीAlthough nitrogen is more electronegative than hydrogen and fluorine is more electronegative than nitrogen, the dipole moment of \( \text{NH}_3 \) (\( 4.90 \times 10^{-30}\text{ C m} \)) is greater than that of \( \text{NF}_3 \) (\( 0.80 \times 10^{-30}\text{ C m} \)). This is because:
Correct answer · Option 3
In \( \text{NH}_3 \), the orbital dipole of the lone pair reinforces the resultant \( \text{N}-\text{H} \) bond dipole, whereas in \( \text{NF}_3 \), it opposes the resultant \( \text{N}-\text{F} \) bond dipole.
Explanation
In \( \text{NH}_3 \), the lone pair orbital dipole adds to the resultant dipole moment of the three \( \text{N}-\text{H} \) bonds, whereas in \( \text{NF}_3 \), it opposes the resultant dipole moment of the three \( \text{N}-\text{F} \) bonds.
