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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. The solar eclipse occurs when
  2. The speed of light with the rise in the temperature of the medium
  3. The marine animal called dugong which is vulnerable to extinction is a/an
  4. Brass gets discoloured in air due to the presence of which gas in air
  5. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  6. The oxide of Nitrogen used in medicine as anaesthetic is
  7. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  8. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  9. Permanent hardness of water can be removed by adding
  10. The recent atomic weight scale is based on
  11. The smallest functional and structural unit of kidney is called as
  12. Which of the following elements is a metal
  13. The type of glass used in making prisms and lenses is
  14. The major ingredient of leather is
  15. Which of the following is commonly called a polyamide ?
  16. Epoxy resins is used as
  17. One fathom is equal to
  18. Old-written material, which cannot be read easily can be read by
  19. Earth's seasons are caused by which of the following?
  20. Liquefied Petroleum gas (LPG) consists of mainly
  21. In an atomic nucleus, neutrons and protons are held together by
  22. The chemial name of Uria is
  23. Lightening cause rainfall because
  24. The property of a substance to absorb moisture from the air on exposure is called
  25. The fastest-running terrestrial animal is
  26. Which of the following is the lightest metal ?
  27. The removal of top soil by water or wind is called
  28. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  29. Cell membrane is
  30. Polythene is industrially prepared by the polymerisation of