[amp_mcq option1=”Cuprite” option2=”Graphite” option3=”Haematite” option4=”Cryolite” correct=”option2″]
The correct answer is B. Graphite.
Graphite is a form of carbon that is used as a lubricant because it is soft and has a low coefficient of friction. It is also used in pencils, batteries, and nuclear reactors.
Cuprite is a copper oxide that is used as a pigment and in the manufacture of copper alloys.
Haematite is an iron oxide that is used in the manufacture of steel and iron alloys.
Cryolite is a mineral that is used in the production of aluminum.