Describe the preparation of potassium dichromate from iron chromite ore.What is the effect of

Describe the preparation of potassium dichromate from chromite ore. What is the effect of increasing pH of potassium dichromate solution ?

Describe the preparation of potassium dichromate from chromite ore. What is the effect of increasing pH on solution of potassium dichromate ?

(a) Describe the preparation of potassium dichromate from chromite ore: (b) How does the acidified solution of potassium permanganate react with (i) oxalic acid (ii) iron (II) ions.

Give the preparation of potassium permanganate from pyrolusite ore.

Explain the method of preparation of sodium dichromate from chromite ore . Give the equation representing oxidation of ferrous salts by dichromate ion.

Potassium dichromate is prepared from

Describe the oxidising action of potassium dichromate and write the ionic equations of reaction with: (i). Iodide (ii). Iron (II) solution and (III). H_2S