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

Potassium dichromate is prepared from

The colour of potassium dichromate is due to

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

What happens when potassium iodide reacts with acidic solution of potassium dichromate ?

Potassium dichromate reacts with HCl to produce

A gas which turns acidified potassium dichromate green.

Decribe, how potassium dichromate is prepared from chromite. Write the chemical equations for the reactions involved.

Which of the following compounds is used as the starting material for the preparation of potassium dichromate?

Describe the preparation of potassium permanganate. How does the acidicfied permanganate solution react with oxalic acid? Write the ionic equation for the reaction. OR Describe the oxidising action of potassium dischromate and write the ionic equaitons for its reaction with (i) an iodide (ii) H_(2)S .

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction. OR Describe the oxidising action of potassium dischromate and write the ionic equations for its reaction with (i) an iodide (ii) H_(2)S .