A violet compound of manganese (A) decomposes on heating to liberate oxygen and 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 liberate and a compound (D) of manganese alongwith other products is formed. Identify compounds A to D and also explain the reaction involved.

Options

A. `{:(P,Q,R,S),(KMnO_4 , K_2MnO_4 , MnCl , MnO_2):}`
B. `{:(P,Q,R,S),(K_2MnO_4 , MnO_2 , KMnO_4 , MnCl_2):}`
C. `{:(P,Q,R,S),(KMnO_4 , K_2MnO_4 , MnO_2 , MnCl_2):}`
D. `{:(P,Q,R,S),(K_2MnO_4 , KMnO_4 , MnO_2 , MnCl_2):}`

Answer

C

Explanation

`P=KMnO_4 , Q=K_2MnO_4 , R=MnO_2 , S=MnCl_3`
`underset"(P)"(2KMnO_4) overset(Delta)to underset"(Q)"(K_2MnO_4) + underset"(R )"(MnO_2) + O_2`
`2MnO_2 + 4KOH + O_2 to 2K_2MnO_4 + 2H_2O`
`MnO_2 + 4NaCl + 4H_2SO_4 to underset"(S)"(MnCl_2) + 2NaHSO_4 + 2H_2O + Cl_2`