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प्रश्न
Choose the correct alternative.
Diamond is used for
पर्याय
making the electrodes of electric furnaces.
making crucible for melting metals.
cutting and drilling rocks and glass.
making carbon brushes for electric motors.
उत्तर
cutting and drilling rocks and glass.
APPEARS IN
संबंधित प्रश्न
Write true or false
Graphite has layers of hexagonal carbon bondings.
Name the following:
A greyish black non- metal that is a good conductor of electricity.
Write ‘True’ Or ‘False’ Against the Following Statement:
Charcoal is a good adsorbent.
Name the following:
The best variety of coal.
Tick the most appropriate answer.
Fuel gases like water gas and producer gas are manufactured from
a. bone charcoal
b. wood charcoal
c. coke
d. none of these
FILL IN THE BLANK
Graphite is a good conductor of .............
TRUE \ FALSE
Graphite is a poor conductor of electricity.
How is wood charcoal a better fuel than wood?
Define the term ‘allotropy’. Give a reason why carbon exhibits allotropy.
Name the following:
An allotrope of carbon used for the manufacture of coke.
