Glass is made from the mixture of

A. Quartz and mica

B. Sand and salt

C. Sand and silicates

D. None of these

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  1. Old-written material, which cannot be read easily can be read by
  2. The element present in the largest amount in rocks and minerals is
  3. The metal that is present in Photo Films is
  4. The fastest acting enzyme in the biological kingdom is
  5. Which of the following parts of the sun is easily visible only during a total solar eclipse?
  6. Which of the following elements is a metal
  7. The speed of light with the rise in the temperature of the medium
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  10. One fathom is equal to
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  17. Apparatus invented by Archimedes is :
  18. What is the unit for measuring the pitch or frequency of sound ?
  19. Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
  20. The fastest-running terrestrial animal is
  21. Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
  22. The property of a substance to absorb moisture from the air on exposure is called
  23. The oxide of Nitrogen used in medicine as anaesthetic is
  24. Nitrification means
  25. Rust is
  26. Brass gets discoloured in air due to the presence of which gas in air
  27. In an atomic nucleus, neutrons and protons are held together by
  28. The formula of Plaster of Paris is
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