Which of the following elements is obtained from sea weeds ?

A. Argon

B. Vanadium

C. Iodine

D. Sulphur

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  1. The recent atomic weight scale is based on
  2. The solar eclipse occurs when
  3. Polythene is industrially prepared by the polymerisation of
  4. Cell membrane is
  5. Bromine is
  6. Pollination by birds is called
  7. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  8. Which of the following is the lightest metal ?
  9. The fastest-running terrestrial animal is
  10. The metal used in storage batteries
  11. The speed of light with the rise in the temperature of the medium
  12. Which of the following characters is not shown by hydrogen
  13. Apparatus invented by Archimedes is :
  14. Glass is made from the mixture of
  15. The property of a substance to absorb moisture from the air on exposure is called
  16. The type of glass used in making prisms and lenses is
  17. The major ingredient of leather is
  18. In an atomic nucleus, neutrons and protons are held together by
  19. The marine animal called dugong which is vulnerable to extinction is a/an
  20. What is the unit for measuring the pitch or frequency of sound ?
  21. Which of the following is commonly called a polyamide ?
  22. Which of the following elements is a metal
  23. The metal that is present in Photo Films is
  24. The hardest substance available on earth is
  25. The formula of Plaster of Paris is
  26. Quartz crystals normally used in quartz clocks etc. is chemically
  27. Nitrification means
  28. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  29. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  30. Epoxy resins is used as