Which glass is usually used in optical work?

A. Lead glass

B. High silica (borosilicate) glass

C. Photo-sensitive glass

D. Fibre glass

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

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  1. Synthetic glycerine is produced from
  2. 10% oleum comprises of 10% free
  3. Fermentation of molasses to produce ethyl alcohol is done at __________ °C.
  4. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond…
  5. Calcination of limestone is not done in a __________ kiln for producing lime.
  6. In the Lurgi coal gasifier
  7. Finely ground calcium aluminate & silicate is a/an
  8. Solvay process as compared to dual process(i.e. modified Solvay process).
  9. Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo.…
  10. Lime and soda ash are added to water to remove
  11. Metallic soap is __________ salt of fatty acids.
  12. Electro deposition of metals i.e. electroplating is never done on
  13. Reaction of an alcohol with organic acid is called the __________ reaction.
  14. The purpose of tanning in leather industry is to
  15. Nitrogen is an essential component of
  16. Lurgi coal gasifier is a pressurised __________ bed reactor.
  17. Solvent used for extraction of oil is
  18. Pick out the wrong statement pertaining to nitric acid.
  19. In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations…
  20. Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
  21. Which of the following is used as a binding material in soap to improve soap texture?
  22. Concentration of hydrogen peroxide is done by
  23. The main use of HCl is in the
  24. An alkali metal salt of Palmitic acid is known as
  25. Drinking (potable) water treatment does not involve
  26. __________ acid is an unsaturated fatty acid.
  27. Enzymes are
  28. Silicon carbide is a/an
  29. The process used for the manufacture of ethyl alcohol from molasses is
  30. Which of the following is a disaccharide?