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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 chemial name of Uria is
  2. The metallic constituents of hard water are
  3. Pollination by birds is called
  4. The oxide of Nitrogen used in medicine as anaesthetic is
  5. Lightening cause rainfall because
  6. The intencity of Earthquakes is measured on
  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. Earth's seasons are caused by which of the following?
  10. Which of the following characters is not shown by hydrogen
  11. Apparatus invented by Archimedes is :
  12. Water has maximum density at
  13. The Panda belongs to the same family as that of
  14. Permanent hardness of water can be removed by adding
  15. According to Daltons atomic theory the smallest particle which can exist independently is
  16. Glass is made from the mixture of
  17. The metal used in storage batteries
  18. Which of the following is in liquid form at room temperature ?
  19. What is the unit for measuring the pitch or frequency of sound ?
  20. Epoxy resins is used as
  21. The fastest-running terrestrial animal is
  22. The fastest acting enzyme in the biological kingdom is
  23. Cell membrane is
  24. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  25. The metal that is present in Photo Films is
  26. Quartz crystals normally used in quartz clocks etc. is chemically
  27. Which of the following is commonly called a polyamide ?
  28. Brass gets discoloured in air due to the presence of which gas in air
  29. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  30. Nitrification means