91. Calgon used in water treatment is chemically
92. The main use of activated carbon in water treatment is to control
93. Type of glass used in optical work is the __________ glass.
94. The most economical pulp for the production of newsprint would be the __________ pulp.
95. Solvay process as compared to dual process (i.e. modified Solvay process)
96. Pick out the wrong statement.
97. Cumene (isopropyl benzene) is made by
98. Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
99. The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
100. Dense soda ash used in the manufacture of glass, is chemically represented by
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