The recent atomic weight scale is based on

A. 1H1

B. 1H2

C. 6C12

D. 8O16

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  1. Which of the following is the lightest metal ?
  2. Glass is made from the mixture of
  3. Polythene is industrially prepared by the polymerisation of
  4. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  5. What is the unit for measuring the pitch or frequency of sound ?
  6. The removal of top soil by water or wind is called
  7. The hardest substance available on earth is
  8. The Panda belongs to the same family as that of
  9. The colour of Emerald is
  10. The smallest functional and structural unit of kidney is called as
  11. The metallic constituents of hard water are
  12. The metal used in storage batteries
  13. Liquefied Petroleum gas (LPG) consists of mainly
  14. The oxide of Nitrogen used in medicine as anaesthetic is
  15. The formula of Plaster of Paris is
  16. Permanent hardness of water can be removed by adding
  17. Which of the following is commonly called a polyamide ?
  18. Which of the following elements is obtained from sea weeds ?
  19. According to Daltons atomic theory the smallest particle which can exist independently is
  20. Earth's seasons are caused by which of the following?
  21. Quartz crystals normally used in quartz clocks etc. is chemically
  22. The chemial name of Uria is
  23. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  24. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  25. The speed of light with the rise in the temperature of the medium
  26. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  27. Cell membrane is
  28. Apparatus invented by Archimedes is :
  29. In an atomic nucleus, neutrons and protons are held together by
  30. The fastest acting enzyme in the biological kingdom is