Oxidation State of C in CH3OH is
-2
Those compounds which have only C, H and O the oxidation number of carbon can be calculated by following formula,
Oxidation number of ′C′=NO×2−NHNC
Where, NO is the number of Oxygen atoms, NH is the number of Hydrogen atoms, NC is the number of Carbon atoms.
CH3OH; NH = 4, NC = 1, NO = 1
Oxidation number of 'C' = (1 × 2 − 4)1 = -2