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Q.

The dipole moment of NH3 (1.47 D) is much higher than that of NH3 (0.23 D) though both have pyramidal shape and one lone pair of electrons on N-atom. Which of the following justifies the above fact?

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a

Electronegativity of N-atom is more than that of H-atom while F-atom has more electronegativity than N-atom.

b

Orbital dipole of N 
Question Image
adds to resultant of three H
Question Image
N dipoles.

c

Orbital dipole of N 
Question Image
Is opposite to that resultant of three N
Question Image
F dipoles.

d

All of the above

answer is D.

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Detailed Solution

Bond moment in ammonia are directed towards central atom nitrogen having lone pair 

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