1.

Water softening by Clark.s process uses

Answer»

`NaHCO_(3)`
`Ca(OH)_(2)`
`Ca(HCO_(3))_(2)`
`Na_(2)CO_(3)`

Solution :Clark's PROCESS is a commercialmethod of WATER softening .
A calculatedamountof QUICK is added to hard water , bicarbonates are converted into insoluable calcium and magnisium carbonates which are filled off .
`CaO +H_(2)O to Ca(OH)_(2)`
`Ca(HCO_(3))_(2) +Ca(OH)_(2) to 2CaCO_(3) uarr +2H_(2)O `


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