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प्रश्न
Name the following:
The hardest naturally occurring substance.
उत्तर
Diamond.
APPEARS IN
संबंधित प्रश्न
______ and ______ are the two major crystalline allotropes of carbon.
Define the Following Term:
Crystal
Tick the most appropriate answer.
Diamond and graphite are
a. metals.
b. organic compounds,
c. alkenes.
d. allotropes.
Tick the most appropriate answer.
Which form of carbon is a good conductor of electricity?
a. graphite
b. diamond
c. coke
d. amorphous carbon
TRUE \ FALSE
Graphite is a poor conductor of electricity.
What is water gas used for ?
State the reasons for use of graphite
(i) as a lubricant for heated machine parts,
(ii) as a lining for crucibles used in manufacture of high grade steel,
(iii) as an electrode in electroplating.
Name the following:
A crystalline allotrope of carbon built up from a hexagonal unit.
Name the following:
An allotrope of carbon used for the manufacture of coke.
Name the following:
An amorphous allotrope of carbon which floats on water.
