Directions: Write True if the statement is correct and write False it is not correct.
Write your answer in a separate sheet of paper.
false
1. It is a form of carbon which makes up the lead in pencils.
2. Pure carbon can exist in different forms, depending on how its atoms
are arranged
3. Coal and soot or carbon black are informally called diamond.
4. Diamond is a form of carbon in which each carbon atom is bonded to
four other carbon atoms.
5. Pure carbon is the name used for carbon that does not have
any crystalline structure.
6. Graphite is the hardest known natural mineral.
7. A fullerene (also called a buckyball) is a form of carbon in which carbon
atoms are arranged in hollow spheres.
8. Pyrolysis is the process of decomposing a substance by the action of
heat.
9. A fullerene is used for cutting and grinding tools as well as for rings and
other pieces of jewelry.
10. Diamond is relatively soft and slippery. It is used as a lubricant​