Assertion :When 10g of CaCO3 is decomposed, 5.6g of residue is left and 4.4g of CO2 is escapes. Reason: Law of mass conservation is followed.
Assertion – The non-fusible impurities present in iron ore are removed by CaCO3 .
Reason: CaCO3 which decomposes into CaO and CO2. The CaO formed reacts with SiO2 to remove silica