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Hi, now we will discuss a question based on the dipole -dipole forces.
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Dipole -dipal forces are a type of intermolecular force.
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Here we have given with a few molecules in that which type of with molecule is possessing dipole -dipole forces as the strongest intermolecular forces we have to find out.
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A, h -3.
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Nh3 is ammonia.
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Ammonia is trigonal bipyramal in shape.
00:30
If you write the structure of ammonia, n, a lone pair of electrons and it is bonded to three hydrogen atoms.
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Here nitrogen is the electronegative element.
00:44
So it will get partial negative charge and hydrogens carry the partial positive charges.
00:53
And because of this asymmetric shape, nitrogen and hydrogen bond is polar in nature and it can form intermolecular force with the other molecule.
01:09
Molecule of ammonia.
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Here this is plus charge.
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Here this forms a dipole.
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And also ammonia is showing hydrogen bonding because of the presence of the highly electronegative element, nitrogen and hydrogen.
01:30
Here it can make the hydrogen bonding also.
01:35
If you see ch4 molecule, ch4 is tetrahedral shape.
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It shows tetrahedral shape.
01:47
Here this is c .h bonds.
01:49
They are having the same polarity because of the symmetrical shape tetrahedral shape and it is a symmetrical molecule because of this the dipoles formed here can be cancelled out all the ch dipoles formed cancel with each other so it possess zero dipole moment so it is non -polar molecule it will not exhibit dipole dipole dipole forces c is bcl3 bcl 3 is processing trigonal planar structure...