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► MCQ Exam ON : Water Treatment

Zeolite used in zeolite softening process for the treatment of hard water gets exhausted after certain time of usage but can be regenerated by flushing it with

1)		10% magnesium sulfate solution
2)		10% calcium chloride solution
3)		10% sodium chloride solution
4)		10% magnesium chloride solution
5)		NULL

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