Question

d) +1
27. What is the oxidation number of phosphorus inPO-?
a) -3
b) +5
c)-8
d) +3
28
LU01
10​

Answer 1

Answer:

I guess letter A

Explanation:

but the real number of oxidation of PO-

p=1

O= -2

can you explain, how can I answer this question?

I know how to get the oxidation but the problem is there nothing to the options.