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- Chemical A is used to remove permanent hardness of water. It could be Option: 1 </div
Chemical A is used to remove permanent hardness of water. It could be
Option: 1
Option: 2
Option: 3
Option: 4
Answers (1)
As we have learned
Removal of permanent Hardness is done by adding Na2CO3 (Washing Soda)
Therefore, option(1) is correct.
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