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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. Quartz crystals normally used in quartz clocks etc. is chemically
  3. One fathom is equal to
  4. Pollination by birds is called
  5. The oxide of Nitrogen used in medicine as anaesthetic is
  6. The colour of Emerald is
  7. The type of glass used in making prisms and lenses is
  8. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  9. Brass gets discoloured in air due to the presence of which gas in air
  10. In an atomic nucleus, neutrons and protons are held together by
  11. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  12. The fastest-running terrestrial animal is
  13. The metal that is present in Photo Films is
  14. The major ingredient of leather is
  15. The most important ore of Aluminium is
  16. The solar eclipse occurs when
  17. Which of the following elements is obtained from sea weeds ?
  18. Which of the following is commonly called a polyamide ?
  19. Polythene is industrially prepared by the polymerisation of
  20. The formula of Plaster of Paris is
  21. Epoxy resins is used as
  22. The property of a substance to absorb moisture from the air on exposure is called
  23. Apparatus invented by Archimedes is :
  24. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  25. The element present in the largest amount in rocks and minerals is
  26. The speed of light with the rise in the temperature of the medium
  27. The Panda belongs to the same family as that of
  28. Permanent hardness of water can be removed by adding
  29. Which of the following elements is a metal
  30. Cell membrane is