Chemistry - Complete d-block Question with Solution | TestHub
ChemistryComplete d-blockd-blockHard2 minQB
ChemistryHardsingle choice
KMnO₄ acts as an oxidising agent in acidic medium. How many moles of KMnO₄ are needed to react with one mole of sulphide ions in acidic solution, if sulphide is oxidised to elemental sulphur?
Options:
Answer:
A
Solution:
Sulphide is oxidised to elemental sulphur: S²⁻ → S + 2e⁻. In acidic medium, MnO₄⁻ gains 5e⁻ to form Mn²⁺. Balancing the electron transfer gives 5 S²⁻ for 2 MnO₄⁻, so one mole of sulphide ions needs 2/5 mole of KMnO₄.
Stream:JEESubject:ChemistryTopic:Complete d-blockSubtopic:d-block
⏱ 2mℹ️ Source: QB
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