10 Questions
What is the formula to calculate the lime requirement for water softening?
74/100 [temporary hardness of Ca + 2 × temporary hardness of Mg + permanent hardness of Mg in terms of CaCO3 equivalents]
What is the purpose of applying pressure higher than the osmotic pressure in reverse osmosis?
To facilitate the flow of solvent molecules from higher concentration to lower concentration
Which of the following is NOT a product of the reaction between CaCl2 and Na2CO3?
Na2CO3
What is the minimum excess pressure required to prevent the entry of solvent molecules into the solution through a semi-permeable membrane?
Osmotic pressure
Which of the following can be used to purify sea water?
Reverse osmosis
What is the formula to calculate the soda requirement for water softening?
106/100 [permanent hardness of CaCl2 + CaSO4 + MgCl2 + MgSO4 in terms of CaCO3 equivalents]
What is the process by which solvent molecules flow from higher concentration to lower concentration through a semi-permeable membrane?
Reverse osmosis
Which of the following reactions produces CaCO3 and NaCl?
CaCl2 + Na2CO3
What is the purpose of water softening?
To remove both temporary and permanent hardness
Which of the following is a method of water treatment?
Reverse osmosis
Test your knowledge of water purification systems, including reverse osmosis, demineralization, and their applications. Learn about the advantages and limitations of these systems and their role in providing clean drinking water.
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