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Question

The mass of CaO that would be obtained by heating 20 kg of 90% pure lime stone is:



A
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B
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C
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D
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Solution

The correct option is C

Mass of pure limestone = (90100)×20=18 kg
CaCO3ΔCaO+CO2
100 kg of CaCO3 forms 56 kg of CaO
18 kg of CaCO3 forms (18×56)100=10.08 kg of CaO


Chemistry

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