What is the oxidation number of Mn in KMnO₄?
Answer and explanation
Correct answer: B. +7
- Step 1: The oxidation numbers in a neutral compound add up to zero (H +1, O -2, K and Na +1).
- Step 2: Setting up the equation for Mn gives +7.
Answer
+7.
Why not the others: +5, +9 and -7 do not fit.
Practise more Atoms, bonding and organic chemistry.
Free questions with an explanation for every one, and full timed Wazari Exam (Iraq Baccalaureate) - Scientific Branch mock tests.
More Atoms, bonding and organic chemistry questions
- How many electrons does the ion ³⁷₁₇Cl⁻ contain?
- What is the oxidation number of Cr in K₂Cr₂O₇?
- What is the oxidation number of N in HNO₃?
- What is the oxidation number of S in Na₂S₂O₃?
- What is the IUPAC name of CH₃CH₂CH₂OH?
- In which direction does the equilibrium (exothermic forward) shift when pressure is increased?