Question

Explain the following: The molecules NH₃ and NF₃ have dipole moments in opposite directions.

Answer 1

In NF3, F is more electronegative than N. So, all F atoms pull the electrons towards themselves. And, this resultant moment is opposite to the directions of that of the lone pair of electrons on the 'N' atom. And, so we have NH3 whose dipole moment is much higher than that of NF3.

Answer 2

HIII....

YOUR ANSWER :-)

THIS IS BECUASE THE ELECTRONEGATIVITY. THE ELECTRONEGATIVITY OF F IS MORE THAN N SO IT PULL THE ELECTRON OF BOND TOWARDS ITSELF . SO DIPOLE MOMENT IS IN DIRECTION AWAY FROM N BUT IN NH3 THE H IS LESS ELECTRONEGATIVE THAN N SO N PULL THE ELECTRON TOWARDS ITSELF AND THE DIPOLE MOMENT IS OPPOSITE.

see attachment

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