71. The temperature at which new grains are formed in the metal is called the __________ temperature.
72. A material capable of undergoing large permanent deformation, when subjected to compression is termed as
73. Plasticisers are added to polymers to improve their
74. DDT is shipped in
75. 'Age hardening' of duralumin is due to
76. The ability of a material to offer resistance to scratching or indentation is a measure of its
77. Cast iron has
78. Hardest materials so far found is
79. Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of
80. Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of
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