Question

When a small amount of KMnO₄ is added to concentrated
H₂SO₄, a green oily compound is obtained which is highly
explosive in nature. Compound may be :
(a) MnSO₄ (b) Mn₂O₇
(c) MnO₂ (d) Mn₂O₃

Answer 1

The product obtained at the end of the reaction is Mn2O7.

Option (D) is correct.

Explanation:

• When concentrated H2 SO4  is added to Mn2 O7  it produces a dark green oil that is KMnO4 .
• The By product of the reaction is permanganic acid, HMnO4 .
• Its structurally can be represented as HOMnO3 .
• It is then dehydrated by cold sulfuric acid to form its anhydride, Mn 2 O 7.
• Thus the product obtained at the end of the reaction is Mn2O7.

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