Identify the option with wrong oxidation state of the atom indicated in bold.
(A) `BaO_(2)` ( -1 for O)
(B) `H_(2)S_(2)O_(8)` ( +6 for S)
(C) `CrO_(5)` ( +10 for Cr)
(D) `Ni(CO)_(4)` ( 0 for Ni)

The oxidation state of S in H_(2)S_(2)O_(8) is

Which of the following set of compounds have peroxide bonds ? 1. O_(2)F_(2) " " 2. H_(2)O_(2) " " 3. H_(2)S_(2)O_(8) " " 4. CrO_(5)

" The oxidation number of the element in the given compounds is H_(2)S_(2)O_(8) H_(2)SO_(3) , HNO_(2) ,and CrO_(3)(H_(2)O )

What is the oxidation of state of S in H_(2)SO_(5) and H_(2)S_(2)O_(8) ?

Find the number of compound which has four orbitals participating in hybridisation in central atom. (a) K_(2)CrO_(4)" "(b) K_(2)Cr_(2)O_(7) (c ) KMnO_(4)" "(d) K_(2)MnO_(4) (e ) [Ni(CN)_(4)]^(2-)" "(f) [NiCl_(4)]^(2-) (g) [PtCl_(4)]^(2-)" "(h) Na_(4)P_(2)O_(7) (i) H_(2)S_(2)O_(8)