The one that is NOT suitable for the removal of permanent hardness of water is:
The one that is NOT suitable for the removal of permanent hardness of water is:
Option 1 -
Calgon's method
Option 2 -
Clark's method
Option 3 -
Treatment with sodium carbonate
Option 4 -
Ion-exchange method
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1 Answer
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Correct Option - 2
Detailed Solution:Boiling and clark's method (Ca (OH)? ) are used for removing temporary hardness. Whereas, calgon, sodium carbonate ion exchange method are used for removing permanent hardness.
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