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प्रश्न
Answer the following question
Why is diamond very hard?
उत्तर
A diamond is a giant molecule. The number of valence electrons in carbon atom is four. As such each carbon atom is linked with four neighboring carbon atoms. Thus forming a rigid tetrahedral structure. It is the strong bonding’that makes diamond the hardest substance.
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संबंधित प्रश्न
______ and ______ are the two major crystalline allotropes of carbon.
Fill in the blank.
............. is the hardest substance that occurs naturally.
Define the Following Term: Allotropy
Define the Following Term :
Carat
Define the Following Term:
Crystal
State the term:
Different forms of an element found in the same physical state.
Answer the following question
What are fullerenes? Name the most common fullerenes.
Answer the following question
What impurity is present in black diamond?
Tick the most appropriate answer.
Which of the following is an amorphous form of carbon?
a. graphite
b. fullerenes
b. diamond
d. coal
Name the following:
The hardest naturally occurring substance.
