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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 property of a substance to absorb moisture from the air on exposure is called
  2. The recent atomic weight scale is based on
  3. When a gas is turned into a liquid, the process is called
  4. Polythene is industrially prepared by the polymerisation of
  5. The most important ore of Aluminium is
  6. Which of the following characters is not shown by hydrogen
  7. Cell membrane is
  8. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  9. Permanent hardness of water can be removed by adding
  10. Which of the following elements is obtained from sea weeds ?
  11. The fastest acting enzyme in the biological kingdom is
  12. One fathom is equal to
  13. Which of the following is commonly called a polyamide ?
  14. The metal used in storage batteries
  15. The element present in the largest amount in rocks and minerals is
  16. Brass gets discoloured in air due to the presence of which gas in air
  17. Nitrification means
  18. Which of the following elements is non-radioactive?
  19. The type of glass used in making prisms and lenses is
  20. The solar eclipse occurs when
  21. According to Daltons atomic theory the smallest particle which can exist independently is
  22. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  23. The fastest-running terrestrial animal is
  24. Which of the following elements is a metal
  25. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  26. The chemial name of Uria is
  27. The Panda belongs to the same family as that of
  28. The oxide of Nitrogen used in medicine as anaesthetic is
  29. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  30. Old-written material, which cannot be read easily can be read by