Home

The metallic constituents of hard water are

A. Calcium, magnesium and iron

B. Magnesium, Calcium and tin

C. Magnesium, tin and iron

D. Iron, tin and calcium

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  2. What is the unit for measuring the pitch or frequency of sound ?
  3. Nitrification means
  4. Water has maximum density at
  5. The type of glass used in making prisms and lenses is
  6. The recent atomic weight scale is based on
  7. The element present in the largest amount in rocks and minerals is
  8. The removal of top soil by water or wind is called
  9. Lightening cause rainfall because
  10. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  11. Quartz crystals normally used in quartz clocks etc. is chemically
  12. The fastest-running terrestrial animal is
  13. Which of the following is the lightest metal ?
  14. Apparatus invented by Archimedes is :
  15. The smallest functional and structural unit of kidney is called as
  16. Pollination by birds is called
  17. When a gas is turned into a liquid, the process is called
  18. Which of the following characters is not shown by hydrogen
  19. One fathom is equal to
  20. The formula of Plaster of Paris is
  21. Epoxy resins is used as
  22. The major ingredient of leather is
  23. According to Daltons atomic theory the smallest particle which can exist independently is
  24. The marine animal called dugong which is vulnerable to extinction is a/an
  25. The metallic constituents of hard water are
  26. The metal that is present in Photo Films is
  27. Earth's seasons are caused by which of the following?
  28. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  29. Which of the following elements is obtained from sea weeds ?
  30. The most important ore of Aluminium is