Calculate the oxidation number of the un...

Calculate the oxidation number of the underlines elements:
a. `underline(P)H_(3)` , b. `underline(M)gO` , c. `Hunderline(N)O_(3)` , d. `H_(3)underline(P)O_(4)`

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The correct Answer is:

A

a. `-3`, b. `+4`, c. `+5`, d. `+5`

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