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Ans. (C) Sol. (A) 2Cu2S + 3O2 2Cu2O + 2SO2 Roasting (B) Fe3O4 + CO 3FeO + CO2 Reduction by CO (C) Al — JEE Mains Chemistry Past Papers Chemistry Question

Question

Ans. (C) Sol. (A) 2Cu2S + 3O2 2Cu2O + 2SO2 Roasting (B) Fe3O4 + CO 3FeO + CO2 Reduction by CO (C) Al2O3 + 2NaOH + 3H2O 2Na[Al(OH)4] Leaching (D) Al2O3 + 6Mg 6MgO + 4Al Thermite reaction

Answer: C

💡 Solution & Explanation

(A) 2Cu2S + 3O2  2Cu2O + 2SO2 Roasting (B) Fe3O4 + CO  3FeO + CO2 Reduction by CO (C) Al2O3 + 2NaOH + 3H2O  2Na[Al(OH)4] Leaching (D) Al2O3 + 6Mg  6MgO + 4Al Thermite reaction

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