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Polythene is industrially prepared by the polymerisation of

A. styrene

B. methane

C. ethylene

D. acetylene

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  1. According to Daltons atomic theory the smallest particle which can exist independently is
  2. One fathom is equal to
  3. What is the unit for measuring the pitch or frequency of sound ?
  4. Lightening cause rainfall because
  5. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  6. The element present in the largest amount in rocks and minerals is
  7. Permanent hardness of water can be removed by adding
  8. Water has maximum density at
  9. Apparatus invented by Archimedes is :
  10. Pollination by birds is called
  11. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  12. The formula of Plaster of Paris is
  13. Rust is
  14. Which of the following is in liquid form at room temperature ?
  15. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  16. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  17. Cell membrane is
  18. The metal that is present in Photo Films is
  19. The major ingredient of leather is
  20. Which of the following is commonly called a polyamide ?
  21. The removal of top soil by water or wind is called
  22. The recent atomic weight scale is based on
  23. The location and energy of an electron in an atom can be specified by
  24. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  25. The most important ore of Aluminium is
  26. Epoxy resins is used as
  27. Glass is made from the mixture of
  28. Which of the following elements is non-radioactive?
  29. Which of the following elements is obtained from sea weeds ?
  30. Quartz crystals normally used in quartz clocks etc. is chemically