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प्रश्न
Answer the following question
What impurity is present in black diamond?
उत्तर
Black diamonds have copper oxide present in them as impurity.
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संबंधित प्रश्न
______ and ______ are the two major crystalline allotropes of carbon.
Answer the following question
Why is graphite a good conductor of electricity but not diamond?
Fill in the blank
.............is formed when charcoal is burnt in a limited supply of air.
Fill in the blank
Wood charcoal is a..........conductor of heat and electricity.
Choose the correct alternative
Anthracite is
Name the following:
The best variety of coal.
Descirbe the formation 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
Explain the difference.
Crystalline and non-crystalline forms of carbon.
Give reason for the following:
Diamond & graphite are allotropic modifications of carbon.
