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    Home » A Violet Compound of Manganese (A) Decomposes

    A Violet Compound of Manganese (A) Decomposes

    Dr. Vikas JasrotiaBy Dr. Vikas JasrotiaJanuary 5, 2022No Comments
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    A Violet Compound of Manganese (A) Decomposes

    Que: A violet compound of manganese (A) decomposes on heating to liberate oxygen and compounds (B) and (C) of manganese is formed. Compound (C) reacts with KOH in the presence of KNO3 to give compound (B). On heating compound (C) with conc. H2SO4 and NaCl, Cl2 gas is liberated and compound (D) of manganese is formed. Identify A, B, C, D along with reactions involved.
    Ans: A – KMnO4                                 B – K2MnO4                C – MnO2                    D – MnCl2

    KMnO4 → K2MnO4 + MnO2 + O2 
    (A)              (B)             (C)

    MnO2 + KOH + KNO3 → 2 K2MnO4 + 2 H2O
    (C)                                       (B)

    MnO2 + 4 NaCl + 4 H2SO4 (conc.) → MnCl2 + 2 NaHSO4 + 2 H2O + Cl2
    (C)                                                          (D)

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    A violet compound of manganese (A) decomposes on heating to liberate oxygen and compounds (B) and (C) of manganese is formed.
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