Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called

A. Carbon Monoxide

B. Phosgene

C. Phosphine

D. None of these

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  1. Apparatus invented by Archimedes is :
  2. The metal that is present in Photo Films is
  3. Brass gets discoloured in air due to the presence of which gas in air
  4. Water has maximum density at
  5. The solar eclipse occurs when
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  14. The removal of top soil by water or wind is called
  15. The fastest acting enzyme in the biological kingdom is
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  17. The formula of Plaster of Paris is
  18. One fathom is equal to
  19. Which of the following elements is obtained from sea weeds ?
  20. Pollination by birds is called
  21. The hardest substance available on earth is
  22. The element present in the largest amount in rocks and minerals is
  23. Earth's seasons are caused by which of the following?
  24. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
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  26. In an atomic nucleus, neutrons and protons are held together by
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