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B
Watrer free from minerals dissolved in it
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C
Wtaer free from impurities
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D
Water free from Na+ and K+ ions
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Solution
The correct option is C Water free from cations and anions Water free from cations (Ca2+,Mg2+,etc.) and anions
(Cl−,SO2−4,HCO−3,etc) is called deionised or
demineralised water.