MCQ
The oxidation number of Phosphorus in $\mathrm{Mg}_2 \mathrm{P}_2 \mathrm{O}_7$ is :
- A$+3$
- B$2$
- ✓$+5$
- D$-3$
✓
Answer
Correct option: C.
$+5$
$\text{Mg}$ has o.n. $= +2$ and $O$ has o.n. $= -2$
$( 2 \times 2 ) + 2x + ( 7 \times -2) = 0$
$4 + 2x - 14 = 0$
$2x = 10$
$x = +5\ ($o.n. of $P)$
$( 2 \times 2 ) + 2x + ( 7 \times -2) = 0$
$4 + 2x - 14 = 0$
$2x = 10$
$x = +5\ ($o.n. of $P)$
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