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  3. Which of the following methods cannot be used to remove parmanent hardness from water? A....

Which of the following methods cannot be used to remove parmanent hardness from water? A....

Which of the following methods cannot be used to remove parmanent hardness from water? A. Addition of washing soda B. addition of caustic soda C. Permutit method D. adding alum to water?
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Asked by De crest on 4th July, 2020
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now