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Oxyacids of Phosphorus

Question

The oxidation state of P in $H_{3} P O_{4}$ is :

A

+ 3

B

+ 5

C

+ 7

D

None of these

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Solution

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We know that oxidation state of $O = - 2, H = + 1$

Now, let's assume oxidation state of $P = x$

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