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Home  >>  JEEMAIN and AIPMT  >>  Chemistry  >>  Hydrogen
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Permanent hardness of water cannot be completely removed by

$\begin{array}{1 1}(a)\;\text{Washing soda}\\(b)\;\text{Permutit method}\\(c)\;\text{Ion exchange method}\\(d)\;\text{Boiling}\end{array}$

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By only boiling temporary hardness cannot be removed.
Hence (d) is the correct answer.
answered Jan 23, 2014 by sreemathi.v
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