Oxidation number of N in (NH4)2SO4 is
−1/3
−1
+1
−3
(NH4)2SO4=2NH+4+SO−−$ NH+4 x+4=+1; x=1-4=-3
Oxidation number of cobalt in K[Co(Co)4] is
The oxidation number of Ca in Ca+2 is
The value of C01.3−C12.3+C23.3−C34.3+⋯+(−1)nCn(n+1).3 is