Q.

Calculate the mass of lime (CaO) obtained by heating 200 kg of 95% lime stone (CaCO3):

1 104.4 kg  
2 105.4 kg  
3 212.8 kg  
4 112 kg  

Ans.

(4)

Mass of pure CaCO3=200×95100=190 kg

CaCO3→ΔCaO+CO2100g 561g56100

190 kg       56100×190 kg = 106.4 kg