71. Density of low density polythene is about __________ gm/c.c.
72. Neoprene is a
73. Neoprene is the trade name of
74. Which of the following is generally not drawn into fibre?
75. In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?
76. Automobile steering wheels are normally made of
77. Which of the following is not a thermoplastic material?
78. Which of the following is not present in bagasse fibre?
79. Main constituent of natural rubber is
80. Diphenylamine is added to rubber to
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