1.

(a) What happens when acidified KMnO_(4) is treated with : (i) KI (i) H_(2)S (ii) KNO_(2) (b) What happens when KMnO_(4) is heated ? Give reaction.

Answer»

Solution :(a) `2KMnO_(4)+ 3H_(2)SO_(4)+ 10KI to K_(2)SO_(4)+ 2MnSO_(4)+ 8H_(2)O+ 5I_(2)`
(ii)`2KMnO_(4)+ 3H_(2)SO_(4)+ 5H_(2)S to K_(2)SO_(4)+ 2MnSO_(4)+ 3H_(2)O+ 5S`
(iii) `2KMnO_(4)+ 3H_(2)SO_(4)+ 5KNO_(2) to K_(2)SO_(4)+ 2MnSO_(4)+ 3H_(2)O+ 5KNO_(3)`
(B) `UNDERSET("Pot. permanganate")(2KMnO_(4)) overset(513K)to underset(" Pot. manganate")(K_(2)MnO_(4))+ MnO_(2)+ O_(2)`


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