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

Question

Professor PC Thomas Classes · Answer

(d) Hardness of water sample $=\frac{200 \mathrm{~g} 	ext { of } \mathrm{CaCO}_3}{10^6 \mathrm{~g} 	ext { of } \mathrm{H}_2 \mathrm{O}}$ 
$ \begin{aligned} & 10^6 \mathrm{~g} 	ext { of } \mathrm{H}_2 \mathrm{O}=200 \mathrm{~g} 	ext { of } \mathrm{CaCO}_3 \ & 10^3 \mathrm{~g} 	ext { of } \mathrm{H}_2 \mathrm{O}=\frac{200 	imes 10^3}{10^6} \mathrm{~g} 	ext { of } \mathrm{CaCO}_3 \end{aligned} $ 
Millimoles of $\mathrm{CaCO}_3=2$ 
Milliequivalents of $\mathrm{CaCO}_3=2 	imes 2=4$