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. One fathom is equal to
  2. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  3. Brass gets discoloured in air due to the presence of which gas in air
  4. The metallic constituents of hard water are
  5. The major ingredient of leather is
  6. The location and energy of an electron in an atom can be specified by
  7. Which of the following is the lightest metal ?
  8. The speed of light with the rise in the temperature of the medium
  9. The element present in the largest amount in rocks and minerals is
  10. The hardest substance available on earth is
  11. The recent atomic weight scale is based on
  12. Rust is
  13. Lightening cause rainfall because
  14. According to Daltons atomic theory the smallest particle which can exist independently is
  15. Old-written material, which cannot be read easily can be read by
  16. Nitrification means
  17. Which of the following is in liquid form at room temperature ?
  18. When a gas is turned into a liquid, the process is called
  19. The chemial name of Uria is
  20. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  21. What is the unit for measuring the pitch or frequency of sound ?
  22. Quartz crystals normally used in quartz clocks etc. is chemically
  23. The property of a substance to absorb moisture from the air on exposure is called
  24. Polythene is industrially prepared by the polymerisation of
  25. The smallest functional and structural unit of kidney is called as
  26. The removal of top soil by water or wind is called
  27. The metal that is present in Photo Films is
  28. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  29. The most important ore of Aluminium is
  30. Earth's seasons are caused by which of the following?