Which one of the following industries uses silica as a raw material? (a) Steel (b) Cement (c) Coal (d) Aluminium
Answers
Explanation:
Industrial silica is used in a vast array of industries, the main ones being the glass, foundries, construction, ceramics, and the chemical industry. Silica in its finest form is also used as functional filler for paints, plastics, rubber, and silica sand is used in water filtration and agriculture.
Cement is made by mixing calcium, silica, aluminium, iron, and other components in a well-supervised chemical reaction. Limestone, shells, and chalk or marl, along with shale, clay, slate, blast furnace slag, silica sand, and iron ore, are key ingredients in cement production. When subjected to heat, these materials combine to form a rock-like compound that is pulverised into the small particles we know as cement.
Therefore, (B) Cement is the correct answer.