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The colour of Emerald is

A. Deep Green

B. Violet

C. Prussian Blue

D. Yellow

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  1. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  2. Which of the following is commonly called a polyamide ?
  3. The metal that is present in Photo Films is
  4. One fathom is equal to
  5. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  6. The type of glass used in making prisms and lenses is
  7. According to Daltons atomic theory the smallest particle which can exist independently is
  8. The solar eclipse occurs when
  9. The metallic constituents of hard water are
  10. Which of the following characters is not shown by hydrogen
  11. Brass gets discoloured in air due to the presence of which gas in air
  12. The major ingredient of leather is
  13. Earth's seasons are caused by which of the following?
  14. The intencity of Earthquakes is measured on
  15. The speed of light with the rise in the temperature of the medium
  16. Liquefied Petroleum gas (LPG) consists of mainly
  17. The property of a substance to absorb moisture from the air on exposure is called
  18. Old-written material, which cannot be read easily can be read by
  19. The chemial name of Uria is
  20. Pollination by birds is called
  21. The recent atomic weight scale is based on
  22. The Panda belongs to the same family as that of
  23. Which of the following is the lightest metal ?
  24. Quartz crystals normally used in quartz clocks etc. is chemically
  25. Which of the following elements is obtained from sea weeds ?
  26. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  27. Rust is
  28. The location and energy of an electron in an atom can be specified by
  29. Polythene is industrially prepared by the polymerisation of
  30. The removal of top soil by water or wind is called