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Which of the following is the correct order of dipole moment?

1. H2O < NF3 < NH3 < BF3
2. NH3 < BF3 < NF3 < H2O
3. BF3 < NF3 < NH3 < H2O
4. BF3 < NH3 < NF3 < H2O

Correct answer: H2O < NF3 < NH3 < BF3

Solution

The dipole moment increases as the electronegativity difference between the atoms in a bond increases. H2O has the highest electronegativity difference, followed by NF3, NH3, and then BF3.

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