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  • When pyrolusite ore  is fused with  in presence of air, a green coloured c

When pyrolusite ore MnO_{2} is fused with KOH in presence of air, a green coloured compound (A) is obtained which undergoes disproportion reaction in acidic medium to give a purple coloured compound (B) :

(i) Write the formulae of the compounds (A) and (B).

(ii) What happens when compound (B) is heated ?

 

 

 

 
 
 
 
 

Answers (1)

MnO_{2}+KOH+O_{2}\rightarrow \underset{(dark green)}{A}\xrightarrow[medium]{Acidic}\underset{(purple)}{B}

(i)  A=K_{2}MnO_{4}

      B=KMnO_{4}

(ii) On heating KMnO_{4} is converted K_{2}MnO_{4}

Posted by

Sumit Saini

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