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Questions  >>  JEEMAIN and NEET  >>  Chemistry  >>  Hydrogen
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In $10^5$g of a sample of water contained 16.2g of $Ca(HCO_3)_2$ then the hardness is

$\begin{array}{1 1}(a)\;200ppm\\(b)\;300ppm\\(c)\;60ppm\\(d)\;100ppm\end{array}$

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