1.

Which of the following water smple has maxiumum degree of hardness?

Answer»

`9.5g "of" MgCl_(2)"in"10^(5)KG" of water "`
`11.1 g "of"CaCl_(2)"in"10^(5)kg"os water "`
`6.8 "of"CaSO_(4)"in"10^(4)kg "of water"`
`1.2 g "of" MgSO_(4)"in"10^(4)"of water"`

Answer :C


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