JAMB - Chemistry (2006 - No. 40)
In which of the following is the oxidation number of sulphur equal to - 2?
SO3
S8
H2S
SO2
Vysvětlení
H\(_2\)S = 0
Bearing in mind that the oxidation state of H = + 1
H\(_2\) + S = 0
2(+1) + S = 0
+ 2 + S = 0
S = 0 - 2
S = - 2