first of all will find for carbon
so x+(-2)+(1*2)=0.x=0
carbon=0.
For oxygen it will b
;4+x+1*2=0,x=-6.
Oxygen=-6. and finally
For hydrogen;
4+(-2)+x*2=0;x=-1.
Hydrogen=-1.
and the overall oxidation state of molecule is zeroo and it is a neutral compound