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AP EAMCET202120 Aug 2021Evening ShiftChemistryd and f Block ElementsActual

A purple colored compound of Manganese ( X ) decomposes on heating to liberate oxygen and forms compounds of Manganese ( Y and Z ) compound Z reacts with KOH in presence of potassium nitrate to give compound Y . Compounds X , Y and Z respectively are

Options

  1. AX - KMnO 4    Y - Mn 2 O 7    Z - MnO 2
  2. BX - K 2 MnO 4 Y - KMnO 4 Z - Mn 2 O 7
  3. CX - KMnO 4 Y - K 2 MnO 4 Z - MnO 2
  4. DX - KMnO 4    Y - MnO 2    Z - MnO

Correct answer

C. X - KMnO 4 Y - K 2 MnO 4 Z - MnO 2

Step-by-step solution

The compound X is KMnO 4 . It gives on heating the oxygen and K 2 MnO 4 and MnO 2 . MnO 2 formed the K 2 MnO 4 on reaction with potassium hydroxide in presence of the potassium nitrate. KMnO 4 ( X )   → Heating   K 2 MnO 4 ( Y ) + MnO 2 ( Z )   + O 2 MnO 2 ( Z )   + KOH / KNO 3 → K 2 MnO 4 ( Y ) Hence, the compounds X , Y and Z respectively are X - KMnO 4 Y - K 2 MnO 4 Z - MnO 2 .

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