A) \[+2\]
B) \[+5\]
C) \[-3\]
D) \[+3\]
Correct Answer: B
Solution :
The pxidation number of P in\[M{{g}_{2}}{{P}_{2}}{{O}_{7}}\] can be calculated as below: Suppose the oxidation number of P is\[x\] \[2(+2)+2(x)=(-14)\] \[4+2x-14=0\] \[2x=10\] \[\therefore \] \[x=+5\]
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