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WATER MCQs

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1. Rain water contain:





2. Underground water contains:





3. Water which gives lather when treated with soap is known as:





4. By boiling water ______ hardness of water can be removed:





5. In zeolite method calcium and magnesium ions of hard water are replaced by:





6. Compound which causes temporary hardness of water is:





7. Compound that causes temporary hardness of water is:





8. Boiling can remove ______ hardness of water:





9. Percentage of NaCl in sea water is:





10. Which one of the following compound causes temporary hardness of water?





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