Question

What is the oxidation number of phosphorus in H₃PO₂ molecule?

Answer 1

Letting y be the oxidation number of phosphoris 3 + x + 2(-2) = 0 => x =1 1oxidation number of P= +1

Answer 2

Let oxidation state of p is x
The.3(1)+x+2(-2) =0
3+x-4=0
X-1=0
X=1
Hence oxidation state of p is 1