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Given below is an approximate composition of a substance : CaO 60-70% SiO2 20-25% Al2O3 5-10% Fe2O3 2-3% The substance is

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Given below is an approximate composition of a substance : CaO 60-70% SiO<sub>2</sub> 20-25% Al<sub>2</sub>O<sub>3</sub> 5-10% Fe<sub>2</sub>O<sub>3</sub> 2-3% The substance is






 
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