Chemistry
Grade-7
Easy

Question

Which of the following are the allotropes of carbon?

  1. Graphite
  2. Diamond
  3. Both A and B
  4. None of these

hintHint:

The property of the elements to exhibit in more than one but in the same. the physical state is known as allotropy.

The correct answer is: Both A and B


    • Graphite and diamond are the allotropes of carbon.
    • Coal, graphite, diamond, and coke are the allotropes of carbon. carbon is the most versatile element of the periodic table. 
    • When an element exists in multiple crystal forms, those forms are called allotropes. The two most common allotropes of carbon are diamond and graphite. The crystal structure of a diamond is an infinite three-dimensional arrangement of carbon atoms, forming a structure in which each bond forms an equal angle with an adjacent bond. When the ends of the bond are joined, the structure becomes a tetrahedral, four-sided, three-sided pyramid structure.

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    • Xenon gas is the rarest gas on earth. Air contains only 0.000009% xenon. Therefore, it is only used when no other alternative lighter gas is available.
    • In addition to xenon, neon and krypton are present at 0.0018% and 0.00011%, respectively.
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