Question:
Which of the following is not related to the removal of permanent hardness of water?
Which of the following is not related to the removal of permanent hardness of water?
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Sodium phosphate does not remove permanent hardness; instead, specific agents like washing soda or zeolites are used.
Updated On: Jun 3, 2025
- \({Na}_2{CO}_3\)
- \({NaAlSiO}_4\)
- \({Na}_6({PO}_3)_6\)
- \({Na}_3{PO}_4\)
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The Correct Option is D
Solution and Explanation
- Permanent hardness is due to dissolved salts like chlorides and sulfates of Ca and Mg.
- Removal agents like \(\mathrm{Na}_2\mathrm{CO}_3\), \(\mathrm{NaAlSiO}_4\), \(\mathrm{Na}_6(\mathrm{PO}_3)_6\) precipitate hardness causing ions.
- \(\mathrm{Na}_3\mathrm{PO}_4\) does not effectively remove permanent hardness.
- Removal agents like \(\mathrm{Na}_2\mathrm{CO}_3\), \(\mathrm{NaAlSiO}_4\), \(\mathrm{Na}_6(\mathrm{PO}_3)_6\) precipitate hardness causing ions.
- \(\mathrm{Na}_3\mathrm{PO}_4\) does not effectively remove permanent hardness.
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