Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of_____________________?

Related Mcqs:

1. Magnesium and calcium ______________ cause temporary hardness of water ?

   A. Carbonates B. Bicarbonates C. Phosphates D. Sulphates...

2. Permanent hardness of water is due to the presence of calcium & magnesium __________________?

   A. Bi-carbonates B. Sulphates & chlorides C. Carbonate D. None of these...

3. Zeolite used in water softening process (cation exchange) is regenerated by washing with___________________?

   A. Brine B. Chloramines C. Sodium bisulphite D. Liquid chlorines...

4. Which of the following processes can remove both temporary as well as permanent hardness of water ?

   A. Filtration B. Boiling C. Distillation D. None of these...

5. Temporary hardness of water can be removed by__________________?

   A. Addition of alum (a coagulant) B. Boiling C. Filtration (through gravity sand filter) D. Addition of lime...

6. Permanent hardness of water can be removed by___________________?

   A. Boiling B. Adding Ca(OH)2 C. Boiling it with Na2CO3 D. None of these...

7. Permanent hardness of water can be removed by____________________?

   A. Simply boiling B. Adding alum C. Passing it through cation & anion exchangers D. All (A), B. and (C)...

8. Which of the following is not responsible for causing permanent hardness of water ?

   A. Ca(HCO3)2 B. CaCl2 C. MgCl2 D. None of these...

9. Permanent hardness of water can be removed by_________________?

   A. Addition of soda ash to it B. Treating it with zeolites C. Passing it through sodium hexametaphosphate D. All A , B, and C....

10. Zeolite is a/an___________________?

    A. Naturally occuring clay which is capable of exchanging cations B. Abrasive material C. Catalyst used in shift conversion D. None of these...