Answer:
C) 0, +5
Explanation:
P + H2O + HNO3 -> H3PO4 + NO
We consider all compounds that contain phosphorus in the equation
A substance that has no charge has a zero oxidation state
Hence at the reactant, phosphorus has an oxidation state of 0
Let us consider H3PO4 at the product side
Oxidation state of
H =+1×3=+3
O=-2×4=-8
P = ?
H3PO4 is a neutral compound and has 0 oxidation state
The sum of the individual oxidation states of each atoms in H3PO4 is equal to 0
Hence,
+3 + P + (-8) = 0
3+P-8=0
P=-3+8=+5
Hence the oxidation state of phosphorus in H3PO4 is +5
Therefore, the oxidation state of P in the reaction changed from
0 to +5
Phosphorus is said to have undergone oxidation
