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In $\mathrm{PO}_{4}^{3-},$ the formal charge on each oxygen atom and the $\mathrm{P}-\mathrm{O}$ bond order respectively are
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The correct answer is:
-0.75,1.25
Bond order
$=\frac{\text { Number of bonds }}{\text { Number of Resonating structures }}$
$=\frac{5}{4}=1.25$
Three unit negative charge is being shared by four $\mathrm{O}$ atoms. Formal charge $=-3 / 4$
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