In: Chemistry
a]
CF4 ----> Hybridisation is sp3
sp3 --> tetrahedral
In tetrahedral dipole moment is zero
b]
H.............Cl...
.....\........./.......
......C.=.C.........
..../..........\.......
Cl..............H...
If you draw a line through the chlorines, you'll see that it goes
right through the center of this molecule. There's not going to be
any NET polarity on this guy at all .
c]
C2H4 ---> It is a sp2 hybrisation because of double bond carbons
SHape of the molecule is trigonal planar
IN trigonal planar the net dipole moment is zero
d]
NF3
Hybridisation is sp3
Pyrimidal shape
LOne present on the Nitrogen
There will be a net dipole moment due to the presence of lone pair on the Nitrogen