Potassium permanganate is prepared from the mineralpyrolusite, MnO_(2). Its crystals have deep purple colour. It acts as an oxidizing agent in the neutral, alkaline as well as acidicmedium. In acidicmedium , it is used in volumetric analysis for estimationof ferrous salts, oxalates etc. The titrations are carried out in presence of H_(2)SO_(4). However ,before using it as a titrant, it is first standized with standard oxalic acid solution or Mohr salt solution. In one of the experiments on titration , 13.4 g of dry pure sodium oxalate ( molar mass =134 g mol^(-1) ) was dissolvedin 100mL of distilled water and then 100 mL of 2MH_(2)SO_(4) were added. The solution, was cooledto 25.30^(@) C. Now to this solution , 0.1 M KMnO_(4) solution was added till a very faint pink colour persisted. Which pyrolusite is fused with KOH andKClO_(3), we get

Potassium permanganate is prepared from the mineralpyrolusite, MnO_(2)

1.	Potassium permanganate is prepared from the mineralpyrolusite, MnO_(2). Its crystals have deep purple colour. It acts as an oxidizing agent in the neutral, alkaline as well as acidicmedium. In acidicmedium , it is used in volumetric analysis for estimationof ferrous salts, oxalates etc. The titrations are carried out in presence of H_(2)SO_(4). However ,before using it as a titrant, it is first standized with standard oxalic acid solution or Mohr salt solution. In one of the experiments on titration , 13.4 g of dry pure sodium oxalate ( molar mass =134 g mol^(-1) ) was dissolvedin 100mL of distilled water and then 100 mL of 2MH_(2)SO_(4) were added. The solution, was cooledto 25.30^(@) C. Now to this solution , 0.1 M KMnO_(4) solution was added till a very faint pink colour persisted. Which pyrolusite is fused with KOH andKClO_(3), we get
Answer» `KMnO_(4)` `K_(2)MnO_(4)` , DARK GREEN Both `KMnO_(4)` and `K_(2) MnO_(4)` None of these Solution :`3MnO_(2)+ 6KOH + KClO_(3) RARR 3K_(2)MnO_(4)+ KCl + 2H_(2)O`