$7.$ What is the primary function of the zeolite process in water treatment?

a$)$ Softening hard water

b$)$ Removing dissolved gases

c$)$ Disinfecting water

d$)$ Removing suspended solids

Which of the following ions is commonly exchanged during the zeolite softening process?

a$)$ Sodium ions

b$)$ Chloride ions

c$)$ Calcium ions

d$)$ Potassium ions

What is the purpose of demineralization by ion exchangers?

a$)$ Removing dissolved gases

b$)$ Removing suspended solids

c$)$ Removing dissolved minerals

d$)$ Disinfecting water

Which ions are typically removed during the demineralization process?

a$)$ Sodium and chloride ions

b$)$ Calcium and magnesium ions

c$)$ Potassium and phosphate ions

d$)$ Chloride and sulfate ions