Question

Oxidation state of phosphorus in the $P{H}_4^{+},P{O}_2^{3-},P{O}_4^{3-}$ and $P{O}_3^{3-}$ respectively are:

• A. $3,+1,+3,+5$
• B. $3,+3,+5,+1$
• C. $+3,3,+5,+1$
• D. $+5,+1,+5,+3$

Answer 1

The correct option is D $+5,+1,+5,+3$

Option (D) is correct.

Let $x$ be the oxidation state of phosphorus in the $P{H}_4^{+}$.
$x+(-1\times 4)=+1$

$x=+5$

Let $x$ be the oxidation state of phosphorus in the $P{O}_2^{3-}$.
$x+(-2\times 2)=-3$

$x=+1$

Let $x$ be the oxidation state of phosphorus in the $P{O}_4^{3-}$.
$x+(-2\times 4)=-3$

$x=+5$

Let $x$ be the oxidation state of phosphorus in the $P{O}_3^{3-}$.
$x+(-2\times 3)=-3$

$x=+3$