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JEE Main 2024 Chemistry question

ChemistryThe d and f-Block ElementsJEE Main 2024

The fusion of chromite ore with sodium carbonate in the presence of air leads to the formation of products A and B along with the evolution of CO. The sum of spin-only magnetic moment values of A and B is B.M. (Nearest integer) (Given atomic number: C : 6, Na : 11, O : 8, Fe : 26, Cr : 24)

Answer: 6

Solution

4FeCr₂O₄ + 8Na₂CO₃ + 7O₂ → 8Na₂CrO₄ + 2Fe₂O₃ + 8CO₂. Na₂CrO₄ (Cr⁶⁺, d⁰)

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Question ID VK-011629