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Apparatus invented by Archimedes is :

A. Pulley

B. Microscope

C. Thermemoter

D. Barometer

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  1. Which of the following elements is obtained from sea weeds ?
  2. Epoxy resins is used as
  3. Water has maximum density at
  4. The speed of light with the rise in the temperature of the medium
  5. One fathom is equal to
  6. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  7. The removal of top soil by water or wind is called
  8. Which of the following is commonly called a polyamide ?
  9. Quartz crystals normally used in quartz clocks etc. is chemically
  10. The marine animal called dugong which is vulnerable to extinction is a/an
  11. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  12. Old-written material, which cannot be read easily can be read by
  13. The major ingredient of leather is
  14. The smallest functional and structural unit of kidney is called as
  15. Lightening cause rainfall because
  16. Which of the following is in liquid form at room temperature ?
  17. The hardest substance available on earth is
  18. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  19. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  20. The property of a substance to absorb moisture from the air on exposure is called
  21. Brass gets discoloured in air due to the presence of which gas in air
  22. The recent atomic weight scale is based on
  23. Pollination by birds is called
  24. According to Daltons atomic theory the smallest particle which can exist independently is
  25. Bromine is
  26. Cell membrane is
  27. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  28. Which of the following is the lightest metal ?
  29. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  30. The most important ore of Aluminium is