Permanent hardness of water can be removed by adding __________?

Related Mcqs:

1. Permanent hardness of water may be removed by the addition of___________?

   A. Sodium Carbonate
   B. Alum
   C. Potassium Permanganate
   D. Lime

   Submitted by: Warraich

2. Permanent hardness of water is due to the presence of __________?

   A. Sodium bicarbonate
   B. Calcium sulfate
   C. Calcium bicarbonate
   D. None of these

   Submitted by: Mirza Musawer Jamil

3. Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?

   A. Zeolites
   B. Sulphonides
   C. Lime
   D. Nitrates

   Submitted by: Rashid Mehmood

4. “Rancidity produced in butter can be decreased by adding quinoline to the butter”. This statements shows that _______________?

   A. Nothing is impossible
   B. Quinoline is an inhibitor
   C. Quinoline is a catalyst
   D. Quinoline is an activator

   Submitted by: Mansoor Ul Haque

5. The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water.

   A. 1 gram
   B. 10 grams
   C. 1 kg
   D. 10 kg

6. Medium sized kidney stones are removed by__________?

   A. Dialysis
   B. Lithotripsy
   C. Excretion
   D. Laser

   Submitted by: Rashid Mehmood

7. An adult have permanent teeth?

   A. 30
   B. 40
   C. 50
   D. 32

   Submitted by: Muhammad Asif Khajjak

8. Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?

   A. Conduction
   B. Convection
   C. Radiation
   D. Reflection
   E. None of these

9. Why are soft drink made with chilled water rather than water at room temperature?

   A. Ingredients dissolve better in chilled water
   B. Chilled water enhances the taste
   C. Chilled water attracts more carbon dioxide 
   D. Chilled water is more hygienic

   Submitted by: Ashfaque Ali Khoso

10. Underground water and the water on the earth’s surface is called ?

    A. Mezosphere
    B. Ionosphere
    C. Hydrosphere
    D. None of these

    Submitted by: Haziq