If hardness of water sample is 200 ppm, then select the incorrect statement :

Statement (4) is incorrectHardness of water sample = 20 g of CaCO3106g of H2O106g of H2O=200 g of CaCO3 103g of H2O=200×103106g of CaCO3=0.2 g CaCO3 (Mw of CaCO3=100 g ) Moles of CaCO3=0.2100=2×10-3moles = 2 m.moles m.Eq. of CaCO3=2×2=4 ('n' factor for CaCO3=2)