What is the oxidation state of phosphorus in phosphate ion?

What is the oxidation state of phosphorus in phosphate ion?
  1. -5
  2. +3
  3. $+5$
  4. +6

Solution

$\begin{aligned} & \text {In } \mathrm{PO}_4{ }^{3-}, \\ & x+4(-2)=-3 \\ & x=-3+8=+5\end{aligned}$

Asked in: MHT CET 2024 (16 May Shift 1)

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