For the bonds in a sulfur dioxide molecule, which are sigma and which are pi????????

Answer 1

:O:
//
S: (SO2)
\\
:O:

There are 2 double bonds here.
Each double bond has 1 sigma bond and 1 pi bond each. Therefore, there will be 1sigma+1pi bond between the S and O atoms on the top of the diagram and 1sigma+1pi bond between the S and O atoms on the bottom ones.

Answer 2

The first bond between any two atoms is always a sigma (overlapping) bond; the second bond (and any subsequent bond) is always pi.

So the single bond is sigma; the double bond has one sigma and one pi bond.