Following tests are shown by
(i) Decolourisation of acidified soln. of `KMnO_4`
(ii) Liberation of `I_2` from an acidified soln. of `K I`
(iii) On treatment with dil `HCl`, brown fumes of `NO_2` which turns `FeSO_4` soln. black.

Following tests are shown by (i) Decolourisation of acidified soln. of KMnO_4 ( ii) Liberation of l_2 from an acidified soln. of KI (iii) On treatment with dil HCl, brown fumes of NO_2

How many moles of acidified K_(2)Cr_(2)O_(7) is required to liberate 6 moles of I_(2) from an aqueous solution of I^(-) ?

Give the reaction of H_2O_2 with the following : i) acidified MnO_2 ii) KMnO_4

An aqueous compound of an inorganic compound (X) shows the following reactions: a. it decolourises and acidified KMnO_(4) solution accompanied by the evolution of oxygen. b. it liberates I_(2) from an acidified KI solution. c. It gives a brown precipitate with alkaline KMnO_(4) solution with evolution of oxygen. d. It removes black stains from old oil paintings. Identify (X) and give chemical equtions for the reaction at steps (a) to (d).

An aqueous compound of an inorganic compound (X) shows the following reactions: a. it decolourises and acidified KMnO_(4) solution accompanied by the evolution of oxygen. b. it liberates I_(2) from an acidified KI solution. c. It gives a brown precipitate with alkaline KMnO_(4) solution with evolution of oxygen. d. It removes black stains from old oil paintings. Identify (X) and give chemical equtions for the reaction at steps (a) to (d).