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The major ingredient of leather is

A. Nucleic acid

B. Carbohydrate

C. Collagen

D. Polymer

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  1. According to Daltons atomic theory the smallest particle which can exist independently is
  2. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  3. The hardest substance available on earth is
  4. Permanent hardness of water can be removed by adding
  5. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  6. The metal used in storage batteries
  7. Quartz crystals normally used in quartz clocks etc. is chemically
  8. Polythene is industrially prepared by the polymerisation of
  9. Which of the following characters is not shown by hydrogen
  10. Which of the following is commonly called a polyamide ?
  11. The intencity of Earthquakes is measured on
  12. The smallest functional and structural unit of kidney is called as
  13. The most important ore of Aluminium is
  14. Bromine is
  15. The removal of top soil by water or wind is called
  16. The type of glass used in making prisms and lenses is
  17. The major ingredient of leather is
  18. The recent atomic weight scale is based on
  19. The Panda belongs to the same family as that of
  20. In an atomic nucleus, neutrons and protons are held together by
  21. Nitrification means
  22. Epoxy resins is used as
  23. Liquefied Petroleum gas (LPG) consists of mainly
  24. Which of the following elements is a metal
  25. The colour of Emerald is
  26. The location and energy of an electron in an atom can be specified by
  27. Apparatus invented by Archimedes is :
  28. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  29. Which of the following is in liquid form at room temperature ?
  30. Old-written material, which cannot be read easily can be read by