JEE Main 2025 Chemistry question
The amount of calcium oxide produced on heating 150 kg limestone (75% pure) is kg. (Nearest integer) Given: Molar mass (in g mol) of Ca-40, O-16, C-12
Answer: 63
Solution
Pure CaCO3 = 112.5 kg = 1125 mol. Each mole gives 1 mole CaO (molar mass 56). Mass CaO = 1125×56/1000 = 63 kg.