Q. Oxidation number of S in $S O_{4}^{- 2}$ is:

2016 256 BVP MedicalBVP Medical 2002 Report Error

A

$+ 4$

B

$+ 6$

C

$+ 5$

D

$+ 8$

Solution:

Let oxidation number of sulphur in $S O_{4}^{- 2}$ is x. $x + 4 (- 2) = - 2$ $x - 8 = - 2,$ $x = + 6$