NEET2026ChemistryChapterActual

What is the oxidation number of Mn in K₂MnO₄ ?

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Correct answer

B. +6

Step-by-step solution

Let the oxidation number of Mn in K₂MnO₄ be x . The oxidation number of potassium ( K ) is +1 and that of oxygen ( O ) is -2 . Since the sum of oxidation numbers of all atoms in a neutral molecule is zero, we have: 2(+1) + x + 4(-2) = 0 2 + x - 8 = 0 x - 6 = 0 x = +6 The oxidation number of Mn in K₂MnO₄ is +6 . Answer: +6

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