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प्रश्न
Permanent hardness in water cannot be cured by ______.
विकल्प
Treatment with washing soda.
Boiling
Calgon's method
Ion exchange method
MCQ
रिक्त स्थान भरें
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उत्तर
Permanent hardness in water cannot be cured by Boiling.
Explanation:
Boiling removes only temporary hardness caused by \[\ce{HCO^-_3}\] (bicarbonate) ions.
shaalaa.com
Water - Temporary Hardness of Water
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