Method of softening water

Which of the following is a common method used to soften water at a household level?

• a) Distillation

• b) Reverse osmosis

• c) Ion exchange

• d) Sedimentation

What is the primary purpose of water softening?

• a) Removing microorganisms

• b) Removing heavy metals

• c) Reducing hardness minerals

• d) Enhancing taste and odor

In the ion exchange process for water softening, what ions replace the calcium and magnesium ions in hard water?

• a) Sodium ions

• b) Chlorine ions

• c) Potassium ions

• d) Phosphate ions

Which method involves the use of resin beads to attract and remove calcium and magnesium ions from water?

• a) Filtration

• b) Distillation

• c) Ion exchange

• d) Chlorination

What is the byproduct of the ion exchange process used in water softening?

• a) Potable water

• b) Calcium chloride

• c) Sodium chloride (salt)

• d) Oxygen gas