AIPMT PRELIMS2007Chemistry-Redox Reactions
AIPMT PRELIMS 2007 Chemistry Oxidation of Sulphite MCQ Question
Type: MCQ-numerical-Hard-Class 11
The number of moles of KMnO₄ that will be needed to react with one mole of sulphite ion in acidic solution is
A
4/5
B
2/5
C
1
D
3/5
Correct Answer
Option D
Detailed Explanation
In acidic solution, KMnO₄ oxidizes sulphite ions to sulphate ions. The balanced reaction shows that 2 moles of KMnO₄ react with 5 moles of sulphite ions, so 3/5 moles of KMnO₄ are needed per mole of sulphite.
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