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Reported Question / Answer
Q.) Calgon is used for removal of
1)
permanent hardness of water
2)
sodium carbonate
3)
none of these
4)
permanent hardness of water
5)
NULL
Answer :
4
Thank you for reporting wrong Question / Answer / Options
We look forward to your suggestions and feedback.
Message / Correct Answer / Suggestion
Human Verification : Answer 2 + 3 = ?
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