71. Fusion of bauxite and __________ produces high alumina cement.
72. Fusion of limestone and __________ produces high alumina cement.
73. Which of the following, when pyrolysed, produces perchloro-ethylene?
74. Naphthalene is removed from coke oven gas by
75. Hydrophilic group of a soap or detergent solution is
76. __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
77. High temperature carbonisation of coal takes place at __________ °C.
78. Low temperature carbonisation of coal takes place at __________ °C.
79. Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.
80. Comparing sulphate process with sulphite process, we find that __________ in the later.
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