The type of glass used in making prisms and lenses is

A. Pyrex glass

B. Soft glass

C. Flint glass

D. Jena glass

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Cell membrane is
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  3. The smallest functional and structural unit of kidney is called as
  4. The solar eclipse occurs when
  5. The formula of Plaster of Paris is
  6. Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
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  10. Bromine is
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  14. The type of glass used in making prisms and lenses is
  15. Permanent hardness of water can be removed by adding
  16. Rust is
  17. Old-written material, which cannot be read easily can be read by
  18. Water has maximum density at
  19. Lightening cause rainfall because
  20. Which of the following is commonly called a polyamide ?
  21. Brass gets discoloured in air due to the presence of which gas in air
  22. The recent atomic weight scale is based on
  23. According to Daltons atomic theory the smallest particle which can exist independently is
  24. Which of the following elements is non-radioactive?
  25. The property of a substance to absorb moisture from the air on exposure is called
  26. The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
  27. Pollination by birds is called
  28. The major ingredient of leather is
  29. Which of the following is in liquid form at room temperature ?
  30. The location and energy of an electron in an atom can be specified by