BPSC (Bihar) Exam > BPSC (Bihar) Questions > Which of the following statements about diamo...
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Which of the following statements about diamond and graphite is true?
- a)They have same electrical conductivity.
- b)They have same crystal structure.
- c)They have same degree of hardness.
- d)More than one of the above
- e)None of the above
Correct answer is option 'E'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statements about diamond and graphite is true?a...
Comparison of Diamond and Graphite
Both diamond and graphite are allotropes of carbon, but they exhibit markedly different properties. Let’s analyze each statement to understand why the correct answer is "E" (None of the above).
Statement A: They have the same electrical conductivity.
- Diamond is an excellent electrical insulator due to its strong covalent bonding and lack of free electrons.
- Graphite, on the other hand, is a good conductor of electricity because it has delocalized electrons that can move freely between layers.
- Conclusion: This statement is false.
Statement B: They have the same crystal structure.
- Diamond has a tetrahedral crystal structure where each carbon atom is bonded to four others in a three-dimensional arrangement.
- Graphite has a layered structure where carbon atoms are arranged in flat, two-dimensional sheets, with weak van der Waals forces between the layers.
- Conclusion: This statement is false.
Statement C: They have the same degree of hardness.
- Diamond is the hardest known natural material, ranking 10 on the Mohs scale of hardness.
- Graphite is relatively soft and can be easily scratched, ranking around 1 to 2 on the Mohs scale.
- Conclusion: This statement is false.
Final Conclusion
Since all three statements (A, B, and C) about diamond and graphite are false, the correct answer is indeed "E" (None of the above). Understanding these differences highlights the unique properties and applications of each allotrope in various fields, from electronics to jewelry.
Both diamond and graphite are allotropes of carbon, but they exhibit markedly different properties. Let’s analyze each statement to understand why the correct answer is "E" (None of the above).
Statement A: They have the same electrical conductivity.
- Diamond is an excellent electrical insulator due to its strong covalent bonding and lack of free electrons.
- Graphite, on the other hand, is a good conductor of electricity because it has delocalized electrons that can move freely between layers.
- Conclusion: This statement is false.
Statement B: They have the same crystal structure.
- Diamond has a tetrahedral crystal structure where each carbon atom is bonded to four others in a three-dimensional arrangement.
- Graphite has a layered structure where carbon atoms are arranged in flat, two-dimensional sheets, with weak van der Waals forces between the layers.
- Conclusion: This statement is false.
Statement C: They have the same degree of hardness.
- Diamond is the hardest known natural material, ranking 10 on the Mohs scale of hardness.
- Graphite is relatively soft and can be easily scratched, ranking around 1 to 2 on the Mohs scale.
- Conclusion: This statement is false.
Final Conclusion
Since all three statements (A, B, and C) about diamond and graphite are false, the correct answer is indeed "E" (None of the above). Understanding these differences highlights the unique properties and applications of each allotrope in various fields, from electronics to jewelry.
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Community Answer
Which of the following statements about diamond and graphite is true?a...
The correct option is none of the above.
- Graphite and diamond are made up of carbon elements.
- They are allotrophs of carbon.
- Graphite and diamond are able to show similar chemical characteristics.
- Thus, they can show the same chemical changes.
- Graphite is present in sheets or layers of carbon atoms that are weakly bonded to each other.
- Diamond has a strong 3-dimensional arrangement of carbon atoms and is hard in nature.
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Which of the following statements about diamond and graphite is true?a)They have same electrical conductivity.b)They have same crystal structure.c)They have same degree of hardness.d)More than one of the abovee)None of the aboveCorrect answer is option 'E'. Can you explain this answer?
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