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Q.

Mass of CaO that shall be obtained by heating 20kg of 90% pure lime stone (CaCO3) is

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a

11.2 kg

b

8.4 kg

c

10.08 kg

d

16.8 kg

answer is C.

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Detailed Solution

CaCO3→ΔCaO+CO2

Pure lime in 20 kg = 20×90100= 18 kg 

CaO produces = 56×18100= 10.08 kg

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