51. __________ of rubber decreases after its vulcanisation.
52. The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
53. Rosin soap is added during paper manufacture to
54. Sulphuric acid is mainly used in the __________ industry.
55. Massacuits is a terminology used in the __________ industry.
56. Acrylonitrile is mainly used in the __________ industry.
57. Most commonly used rubber vulcanising agent is
58. Blue colour is imparted to glass by the addition of
59. Oils and fats are converted to soap in a process called
60. Sea weeds are an important source of
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