Why is the dipole moment of so2 1.63 d but that of co2 is zero?

SO2 molecule have a dipole moment and a CO2 molecule doesn't ... Dipole moment of CO2 molecule is zero,becoz it is linear molecule,whereas SO2 is angular

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

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