The pair that contains mixed oxides is
(A) `Cl_(2)O_(7)` and `Fe_(3)O_(4)`
(B) `Pb_(3)O_(4)` and `Fe_(3)O_(4) `
(C) `C_(3)O_(2)` and `Fe_(3)O_(4)`
(D) `N_(2)O_(5)` and `Cl_(2)O_(7)`

FeCr_(2)O_(4)+Na_(2)CO_(3)+O_(2) to Fe_(2)O_(3)darr+Na_(2)CrO_(4)

Among the following oxides how many of them are mixed oxides ? (a) H_(2)O , (b) C_(3)O_(2) , (c ) Fe_(3)O_(4) , (d) Fe_(2)O_(3) (e) Pb_(3)O_(4) , (f) PbO_(2) , (g) Co(AlO_(2))_(2) , (h) Mn_(3)O_(4)

Find the number of mixed oxides among the following: Mn_(3)O_(4),Fe_(3)O_(4),Co_(3)O_(4),Mn_(2)O_(3),MnO_(2),Fe_(2)O_(3),NiO,CrO_(2),CrO_(3) ,

Find the oxidation number of Fe in Fe_(3)O_(4) and in Fe(III)_(4)[Fe(II)(CN)_(6)]_(3) .

Among the following oxides how many of them are suboxides ? (a) C_(3)O_(2) , (b) N_(2)O , (c ) NO_(2) , (d) CO (e) Fe_(3)O_(4) , (f) KO_(2)