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Permanent hardness of water is due to the presence ofa)sulphates of sodium and potassiumb)sulphates of magnesium and calciumc)carbonates of sodium and magnesiumd)bicarbonates of magnesium and calciumCorrect answer is option 'B'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Permanent hardness of water is due to the presence ofa)sulphates of sodium and potassiumb)sulphates of magnesium and calciumc)carbonates of sodium and magnesiumd)bicarbonates of magnesium and calciumCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Permanent hardness of water is due to the presence ofa)sulphates of sodium and potassiumb)sulphates of magnesium and calciumc)carbonates of sodium and magnesiumd)bicarbonates of magnesium and calciumCorrect answer is option 'B'. Can you explain this answer?.

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