81. In which of the following industries is mica used as a raw material?
82. When calcium oxide reacts with water, . . . . . . . . is formed as a product:
83. Magnesium ribbon burns with a bright white flame and turns into the . . . . . . . . colour powder.
84. What are the products as a result of thermal decomposition of lead nitrate?
85. Lime water turns milky on passing carbon dioxide gas through it due to the formation of:
86. Which of the following is the chemical name of baking soda?
87. What is the chemical name of lime water?
88. A copper substances when exposed to air gains a green coating due to the formation of
89. Metallurgy is a process-
90. Which product is formed when electricity is passed through a solution made in water of sodium chloride?
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