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प्रश्न
Fill in the blank.
The tendency of an element to exist in two or more forms but in the same physical state is called ................
उत्तर
The tendency of an element to exist in two or more forms but in the same physical state is called Allotropy.
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संबंधित प्रश्न
Write true or false
Graphite has layers of hexagonal carbon bondings.
Write true or false
Diamond is insoluble in all solvents.
Name the following:
The third crystalline form of carbon.
Name the following:
The purest form of amorphous carbon.
TRUE \ FALSE
Synthetic diamonds are used for cutting glass and drilling rocks.
TRUE \ FALSE
Graphite is a poor conductor of electricity.
Name the following:
The hardest naturally occurring substance.
Compare the structure of the crystal of diamond & graphite with special reference to the reason for diamond being the hardest natural substance while graphite one of the softest. Compare the electrical & thermal conductivity of the two crystalline allotropes of carbon.
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.
The amorphous allotropic carbon is used for making electrodes in dry cell ______.
