The intencity of Earthquakes is measured on

A. Beaufort scale

B. Secant scale

C. Mercalli scale

D. Richter scale

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  1. The recent atomic weight scale is based on
  2. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  3. The element present in the largest amount in rocks and minerals is
  4. The solar eclipse occurs when
  5. Quartz crystals normally used in quartz clocks etc. is chemically
  6. The formula of Plaster of Paris is
  7. The intencity of Earthquakes is measured on
  8. One fathom is equal to
  9. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  10. The speed of light with the rise in the temperature of the medium
  11. The metal used in storage batteries
  12. Old-written material, which cannot be read easily can be read by
  13. Which of the following elements is non-radioactive?
  14. Which of the following characters is not shown by hydrogen
  15. The metal that is present in Photo Films is
  16. The chemial name of Uria is
  17. The smallest functional and structural unit of kidney is called as
  18. The removal of top soil by water or wind is called
  19. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  20. Brass gets discoloured in air due to the presence of which gas in air
  21. What is the unit for measuring the pitch or frequency of sound ?
  22. Glass is made from the mixture of
  23. Nitrification means
  24. Which of the following is in liquid form at room temperature ?
  25. The marine animal called dugong which is vulnerable to extinction is a/an
  26. Which of the following is the lightest metal ?
  27. Polythene is industrially prepared by the polymerisation of
  28. Lightening cause rainfall because
  29. Apparatus invented by Archimedes is :
  30. Epoxy resins is used as