The oxidation state of nitrogen is correctly given for

Answer

D

Explanation

`A) [Co^(3+) (NH_3)_(5)^(0) ]^(2+) Cl_(2)^(-1 xx2 ) , NH_3 , x + 3=0 implies x=-3 : ` oxidation state of `N=-3`
B) ` NH_2 OH : x + 3-2 =0 implies X=-1 x=-2 ` Oxidation number of N=-1
C ) `(N_2 H_5)^(+1xx 2) SO_(4)^(2-) : N_2 H_(5)^(o+) : 2x + 5 =+ 1 implies x =-2 ,` oxidation number of N=-2
D) ` overset(+2xx3)(Mg_3) overset(-3xx2)(N_2) : ` Oxidation state of `N=-3`