Chemistry - Redox Reactions Question with Solution | TestHub
ChemistryRedox ReactionsProblem involving Equivalent ConceptEasy2 minQB
ChemistryEasysingle choice
In an acidic solution, I⁻ changes to I₂. How many grams of I₂ is produced if, in the same process, 1.5 × 10²² electrons are used up to reduce H₃AsO₄ to H₃AsO₃? (I = 127)
Options:
Answer:
D
Solution:
Moles of electrons = (1.5 × 10²²)/(6 × 10²³) = 0.025 mol (As +5 +3 takes 2 e⁻ each; the same electrons come from I⁻). 2I⁻ I₂ + 2e⁻, so moles of I₂ = 0.025/2 = 0.0125. Mass = 0.0125 × 254 ≈ 3.2 g. Hence (d).
Stream:JEESubject:ChemistryTopic:Redox ReactionsSubtopic:Problem involving Equivalent Concept
⏱ 2mℹ️ Source: QB
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