Q. The oxidation number of $P$ in $M g_{2} P_{2} O_{7}$ is

1316 204 Redox Reactions Report Error

A

$+ 3$

8%

B

$+ 2$

7%

C

$+ 5$

82%

D

$- 3$

3%

Solution:

$M g_{2} + 2 P_{2} x O_{7} - 2$ i.e., $2 (+ 2) + 2 (x) + 7 (- 2) = 0$
$\Rightarrow x = + 5$