51. Fourdrinier machine is used in the manufacture of
52. Bromine is used in the preparation of
53. Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about
54. Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
55. Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?
56. __________ glass is used for the manufacture of optical glass.
57. Caprolactum (a raw material for nylon-6 manufacture) is produced from
58. In the manufacture of viscose rayon, the raw material used industrially is
59. Bromine content in sea water may be around __________ ppm.
60. Nickel is not used as a catalyst in the
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