Give the preparation of `KMnO_4` from pyrolusite ore.

Write the preparatopm of KMnO_4 from pyrolusite ore.

Write chemical reaction for preparation of KMnO_4 from Pyrolusite ore.

Write chemical reaction for preparation of K2Cr207 from chromite ore.

Give the preparation of alcohols from alkenes. Also discuss its mechanism.

Give preparation of dihydrogen from Lane's process .

Give preparation of dihydrogen from Bosch process.

Give the chemical reaction involved in the preparation of urotropine from formaldehyde.

Give the preparation of Potassium Permanganate from Pyrolusite ore.

Give the chemical reactions for the preparation of phenol from cumene.

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