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13. it releases heat and the product formed is slaked lime or calcium hydroxide
14. oil and other oily stuff get oxidised due to atm.oxygen and become rancid, to prevnt, we must store them in air tight containers or add antioxidants
15. moisture and oxygen are necessary for corrosion and this is bad for the industry as this cause various metals to become weak and degrade which is why they need to be replaced every year.
16. the limewater turns milky . CaCO3+HCL > CaCl2+H2O+CO2
CO2+Ca(OH)2 > CaCO3
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