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General Science Elements Metals - Discussion Page For Q.1457 | General Knowledge Questions and Answers | General Knowledge Free Online-Tests | LucentBlackBoard | LucentBlackBoard.com
Q: Permanent hardness of water may be removed by the addition of
A. sodium carbonate B. alum
C. potassium permanganate D. lime

Answer and Explanation

Answer:sodium carbonate

Explanation:
There is no explanation...

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