Why is potassium permanganate used for cleaning of water tanks?

Answer the following questions : Why is potassium permanganate used during cleaning water tanks ?

Give scientific reasons: A potassium permanganate solution in water is a homogeneous solution in water is a homogeneous mixture, while a mixture of oil and water is a heterogeneous mixture

Answer the following question : Classify the following into homogeneous solution and heterogeneous solution: Soda water, potassium permanganate solution, milk, alcohol in water, ink solution, wheat flour in water.

In laboratory, a student added 3 mL ethanol and 5 mL sodium carbonate in a test tube and warmed the mixture for few minutes. He then slowly added few drops of potassium permanganate to this warm solution with constant stirring. He observed that the pink colour of potassium permanganate had disappeared. This is because ______________ .

Answer the following questions : Acidified potassium permanganate (KMnO_4) is a chemical oxidant and explain, how acidified potassium permanganate oxidise ferrous sulphate (FeSO_4) . Accordingly write a new definition of oxidation and reduction.

On heating potassium permanganate, one of the following compound is NOT obtained?

How will you prepare potassium permanganate from manganate.

Apparatus: A beaker, potassium permaganate crystals, a burner, water, etc. : Procedure: Take some water in a beaker. Heat the beaker slowly on a gas burner. Drop a few crystals of potassium permaganate into the water. Now watch the water in the beaker carefully. What do you see?