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  • Which of the following methods cannot be used to remove permanent hardness of water ? Option: 1 synthetic resin method <div c

Which of the following methods cannot be used to remove permanent hardness of water ? 

Option: 1

synthetic resin method 


Option: 2

Treatment with washing soda 


Option: 3

Clark's method 


Option: 4

calgon method 


Answers (1)

best_answer

As we have learned

Permanent Hardness -

Such hardness is due to calcium or magnesium chloride and sulphate.

- wherein

It can be removed by

1)    Calgon's method

2)    Ion exchange method

 

 clark's method can only remove temporary hardness 

 

Posted by

mansi

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