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Water softening by Clark.s process uses...

Water softening by Clark.s process uses

A

`NaHCO_(3)`

B

`Ca(OH)_(2)`

C

`Ca(HCO_(3))_(2)`

D

`Na_(2)CO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
Clark's process is a commercial method of water softening .
A calculated amount of 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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Knowledge Check

  • Water softening by clark process uses

    A
    `Na_(2)CO_(3)`
    B
    `CaHCO_(3)`
    C
    `Ca(OH)_(2)`
    D
    `NaHCO_(3)`

  • Parke's process is used

    A
    to extract Ag using NaCN
    B
    to extract Age from argentiferous lead by adding zinc
    C
    to extract Ag by forming amalgam
    D
    to extract Ni using carbonyls

  • Polyhosphates are used as water softening agents because they

    A
    1. form soluble complexes with anionic species
    B
    2. precipitate anionic species
    C
    3. form soluble complexes with cationic species
    D
    4. precipitate cationic species

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