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The major ingredient of leather is

A. Nucleic acid

B. Carbohydrate

C. Collagen

D. Polymer

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  1. The removal of top soil by water or wind is called
  2. One fathom is equal to
  3. Apparatus invented by Archimedes is :
  4. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  5. The fastest acting enzyme in the biological kingdom is
  6. According to Daltons atomic theory the smallest particle which can exist independently is
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  8. The solar eclipse occurs when
  9. The formula of Plaster of Paris is
  10. The speed of light with the rise in the temperature of the medium
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  14. Rust is
  15. The oxide of Nitrogen used in medicine as anaesthetic is
  16. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  17. The intencity of Earthquakes is measured on
  18. The fastest-running terrestrial animal is
  19. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  20. The metal that is present in Photo Films is
  21. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  22. Cell membrane is
  23. The chemial name of Uria is
  24. The marine animal called dugong which is vulnerable to extinction is a/an
  25. Lightening cause rainfall because
  26. Glass is made from the mixture of
  27. Which of the following elements is a metal
  28. The metal used in storage batteries
  29. When a gas is turned into a liquid, the process is called
  30. The property of a substance to absorb moisture from the air on exposure is called