Question

check whether the following compounds have the dipole moment - zero or non zero. CH4 , H2O , NH3 , NF3 ,CO2 , SO2 ,HCL....

Answer 1

Zero dipole moment is in CH4, NH3, NF3 and CO2. It is so as after drawing correct structure we will find that is all zero dipole moment cases the vector sum of of bond polarity will be 0 i.e. in simple word the structure will not have any lone pair at central atom and if it haves then check whether tje lone pair repulsion is cancelled out or not..