GEOLOGY
ECONOMIC GEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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glass
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in gunpowder, medicines, and rubber
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in pencils, paint, lubricants, and batteries
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as wiring, in coins and jewelry, building ornaments
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Detailed explanation-1: -Graphite is used in pencils, lubricants, crucibles, foundry facings, polishes, arc lamps, batteries, brushes for electric motors, and cores of nuclear reactors. It is mined extensively in China, India, Brazil, North Korea, and Canada.
Detailed explanation-2: -The “lead” in a pencil isn’t actually made from lead. It is made from a form of carbon called graphite. The graphite is mixed with clay and formed into long thin pencil lead.
Detailed explanation-3: -What are two uses of graphite? In pencils and lubricants, graphite is used. It is a strong heat and energy conductor. In electrical devices such as electrodes, batteries, and solar panels, its high conductivity makes it useful.
Detailed explanation-4: -Because the bonds between the sheets are weak, graphite shows lower shearing strength under friction force. Thus it can be used as a solid lubricant and has become one of traditional and primary solid lubrication materials.