When acidified solution of `K_(2)Cr_(2)O_(7)` is shaken with aqeous solution of `FeSO_(4)`, Then:

Acidified solution of K_(2)Cr_(2)O_(7) on treatment with H_(2)O_(2) yields :

When H_(2)O_(2) is shaken with an acidified solution of K_(2)Cr_(2)O_(7) is presence of ether, layer turns blue due to the formation of-

When SO_(2) gas is passed through an acidified solution of K_(2)Cr_(2)O_(7) the orange colour of the solution changes to

When H_(2)O_(2) is added to a acidified solution of K_(2)Cr_(2)O_(7) :

When H_(2)O_(2) is added to a acidified solution of K_(2)Cr_(2)O_(7) :

When H_(2)O_(2) is shaken with an acidified solution of K_(2)Cr_(2)O_(7) in the presence of ether , the ethereal layer turns blue due to the formation of

When acidified K_(2)Cr_(2)O_(7) solution is added to solution of Sn^(2+) salts then Sn^(2+) changes to -