Question

Preparation of KMnO\(_4\) from Mg(II):

• A. Manganese oxide
• B. Potassium permanganate
• C. Manganese dioxide
• D. Potassium manganese oxide

Hint:

The oxidation of manganese compounds (like MnO\(_2\)) to higher oxidation states such as +7 is essential for the preparation of potassium permanganate.

Answer 1

The Correct Option is B

The preparation of potassium permanganate KMnO\(_4\) from magnesium (Mg) typically involves an oxidation reaction. Magnesium reacts with manganese(II) compounds to form manganese dioxide MnO\(_2\), which is then further oxidized to potassium permanganate. The overall reaction process involves first converting Mn(II) (in a compound like magnesium permanganate) to Mn(VII) (in KMnO\(_4\)) through oxidation. The potassium cation (K\(+\)) is introduced to form potassium permanganate KMnO\(_4\). Thus, the correct answer is Potassium permanganate KMnO\(_4\).