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CO2SiO2SnO2CaO |
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Answer» Correct Answer: SnO2 Explanation: CaO — basic CO2 — acidic SiO2 — weakly acidic SnO2 — amphoteric The above reaction mentioned as SnO2 + 2NaOH → Na2SnO3 + H2OSnO2 + 4HCl → SnCl4+2H2O |
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