Class 11 Chemistry Hydrogen Water or hydride of oxygen

Easy

The following methods can not be used to remove permanent hardness of water:

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A
Treatment with washing soda
B
Ion-exchange method
C
Treating with Calgon
D
Adding calculated amount of lime

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Hydrogen

Subtopic

Water or hydride of oxygen

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$C$. Sodium hexametaphosphate is used in the removal of permanent hardness of water.

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