MCQ
The oxidation number of Phosphorus in Mg2​P2​O7​ is:
  • A
    +3
  • B
     2
  • C
    +5
  • D
    -3

Answer

  1. +5

Explanation:

Mg has o.n. = +2 and O has o.n. = -2

( 2 × 2 ) + 2x + ( 7 × -2) = 0 

4 + 2x - 14 = 0

2x = 10

x = +5 ( o.n. of P)

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