A violet compound of manganese (A) decomposes on heating to liberate oxygen compounds (B) and (C ) of manganese are formed. Compound (C ) reacts with KOH in the presence of potassium nitrate to give compound (B). On heating compound (C ) with conc. H_(2)SO_(4) and NaCl, chlorine gas is liberated and a compound (D) of manganese along with other products is formed. Identify compounds A to D and also explain the reactions involved.

A violet compound of manganese (A) decomposes on heating to liberate o

1.	A violet compound of manganese (A) decomposes on heating to liberate oxygen compounds (B) and (C ) of manganese are formed. Compound (C ) reacts with KOH in the presence of potassium nitrate to give compound (B). On heating compound (C ) with conc. H_(2)SO_(4) and NaCl, chlorine gas is liberated and a compound (D) of manganese along with other products is formed. Identify compounds A to D and also explain the reactions involved.
Answer» SOLUTION :`A: KMnO_(4), B: K_(2)MnO_(4), C: MnO_(2), D: MnCl_(2)` `underset((A))(2KMnO_(4)) underset("decomposes")overset(Delta)rarr underset((B))(K_(2)MnO_(4))+ underset((C ))(MnO_(2)) + O_(2)` `underset(( C))(2MnO_(2)) + 4KOH + O_(2) overset(KNO_(3))rarr underset((B))(2K_(2) MnO_(4)) + 2H_(2)O` `underset((C ))(MnO_(2)) + 4NaCl + 4H_(2)SO_(4) overset(Delta)rarr underset((D))(MnCl_(2)) + 2NaHSO_(4) + 2H_(2)O + Cl_(2)`