Cartain materials such as turpentine oil, unsaturated organic compound, phosophorus, metals such as `Zn`, and `Pb`, etc., can absorb `O_(2)` from air in the presence of `H_(2)O`, which is converted to absorb `O_(2)` from air in the presence of `H_(2)O`, which is converted to `H_(2)O_(2)`. This is called autoxidation. Intermolecular redox reactions are those in which one molecule is oxidised and the other is reduced. Intramolecular redox reactions are those in which oen atom of a molecule is oxidised and the other atom is reduced.
Which of the following reactions has`//`have spectator ions?

Options

A. `Zn+CuSO_(4)rarrZnSO_(4)+Cu`
B. `KIO_(3)+KI+H_(2)SO_(4)rarrKI_(3)+K_(2)SO_(4)+H_(2)O`
C. `2KMnO_(4)+10KCl+8H_(2)SO_(4)rarr5Cl_(2)+2MnSO_(4)+8H_(2)O+6K_(2)SO_(4)`
D. `[CrCl_(6)]^(3-)+Zn[ZnCl_(4)]^(2-)+Cr^(2+)`

Answer

A, B, C, D

Explanation

Spectator ions in `(a), (b)`, and `(c )` are `SO_(4)^(2-)` ions while in `(d)`, it is `Cl^(ө)` ion, since all of them remain unchanged