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Bromine is

A. A Black solid

B. A red liquid

C. A highly inflammable gas

D. colourless gas insoluble in water

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  1. The metallic constituents of hard water are
  2. Glass is made from the mixture of
  3. Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
  4. Permanent hardness of water can be removed by adding
  5. The marine animal called dugong which is vulnerable to extinction is a/an
  6. Apparatus invented by Archimedes is :
  7. One fathom is equal to
  8. Rust is
  9. The speed of light with the rise in the temperature of the medium
  10. Bromine is
  11. The intencity of Earthquakes is measured on
  12. Polythene is industrially prepared by the polymerisation of
  13. Water has maximum density at
  14. The fastest-running terrestrial animal is
  15. The property of a substance to absorb moisture from the air on exposure is called
  16. Quartz crystals normally used in quartz clocks etc. is chemically
  17. The fastest acting enzyme in the biological kingdom is
  18. The hardest substance available on earth is
  19. The type of glass used in making prisms and lenses is
  20. The major ingredient of leather is
  21. What is the unit for measuring the pitch or frequency of sound ?
  22. When a gas is turned into a liquid, the process is called
  23. Pollination by birds is called
  24. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  25. Old-written material, which cannot be read easily can be read by
  26. Which of the following elements is obtained from sea weeds ?
  27. The metal used in storage batteries
  28. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
  29. In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
  30. The oxide of Nitrogen used in medicine as anaesthetic is