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Old-written material, which cannot be read easily can be read by

A. None of these

B. Ultraviolet rays

C. Infra Red rays

D. Cosmic Rays

You can do it
  1. The location and energy of an electron in an atom can be specified by
  2. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  3. When a gas is turned into a liquid, the process is called
  4. The most important ore of Aluminium is
  5. The speed of light with the rise in the temperature of the medium
  6. What is the unit for measuring the pitch or frequency of sound ?
  7. Earth's seasons are caused by which of the following?
  8. The hardest substance available on earth is
  9. Apparatus invented by Archimedes is :
  10. Glass is made from the mixture of
  11. The metal used in storage batteries
  12. Pollination by birds is called
  13. The metallic constituents of hard water are
  14. The recent atomic weight scale is based on
  15. The colour of Emerald is
  16. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  17. The chemial name of Uria is
  18. Epoxy resins is used as
  19. Which of the following is the lightest metal ?
  20. Which of the following is in liquid form at room temperature ?
  21. Old-written material, which cannot be read easily can be read by
  22. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  23. The removal of top soil by water or wind is called
  24. The formula of Plaster of Paris is
  25. The type of glass used in making prisms and lenses is
  26. According to Daltons atomic theory the smallest particle which can exist independently is
  27. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  28. One fathom is equal to
  29. Liquefied Petroleum gas (LPG) consists of mainly
  30. Permanent hardness of water can be removed by adding