The electronegativity of C is 2.5 and that of Cl is 3.0
Therefore inea C-Cl bond the difference in electronegativity is 0.5 - means it is polar.
In a molecule of CCl4 there are 4 C-Cl bonds which are directed towards the corners of a regular tetrahedron.So even if the individual bonds are polar the molecule as a whole is non-polar( the bond polarities cancel out due to the symmetry of the molecule)
Comments
The electronegativity of C is 2.5 and that of Cl is 3.0
Therefore inea C-Cl bond the difference in electronegativity is 0.5 - means it is polar.
In a molecule of CCl4 there are 4 C-Cl bonds which are directed towards the corners of a regular tetrahedron.So even if the individual bonds are polar the molecule as a whole is non-polar( the bond polarities cancel out due to the symmetry of the molecule)
the four bonds are non polar because the charge around the carbon atom is equally spread out in the four bonds
cacl2