81. Dry ice (solidified CO2) is used for the
82. Which one of the following is not an elastomer?
83. Unsaturated oils compared to saturated oils have
84. Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.
85. DDT should not be allowed to come in contact with iron (during its manufacture) to
86. __________ iron is the purest form of iron.
87. Liquefaction of gases can not be done by
88. Function of thinner in a paint is to
89. __________ process is used for the manufacture of sodium carbonate by ammonia soda process.
90. __________ acid is the main constituent of cotton seed oil.
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