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

Related Mcqs:

1. 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...

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

   A. Sodium Carbonate B. Alum C. Potassium Permanganate D. Lime Submitted by: Warraich...

3. Permanent hardness of water can be removed by adding __________?

   A. Chlorine B. Washing soda C. Bleaching powder D. None of these Submitted by: Fahad Mehsud...

4. Which of following metals can be displaced by all other metals from its solution ?

   A. Ag B. A C. Au D. Cu...

5. _____________ surfactants perform well over a wide range water hardness and PH?

   A. Anionic B. Cationic C. Nonionic D. Neutral Submitted by: Muhammad Ali Kunbhar...

6. Any process of chemical decay of metals due to the action of surrounding medium is called__________________?

   A. activation B. enameling C. corrosion D. coating...

7. Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?

   A. Smaller electronegativity of alkali metals B. Smaller ionic radius of these metals C. De-excitation of electrons from higher energy levels to low energy level D. Excitation of electrons from low energy levels to higher energy levels...

8. Second ionization potential of alkali metals are very high due to_______________?

   A. being s-block elements B. inert gas configurations C. ns1 electronic configuration D. being metals...

9. Calcium sulphate is known as__________?

   A. Epsom salt B. Gypsum salt C. Blue vitriol D. Potash alum Submitted by: ABDUL HAYEE...

10. The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?

    A. Ethylene iodide B. Ethylene bromide C. Ethylene chloride D. Ethylene fluoride...