Question
Download Solution PDFWhich among the following statements is not correct with respect to allotropes of Carbon?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Next to diamond, graphite is the second hardest known substance.
Key Points
- Allotropes of carbon:
- Carbon allotropes refer to different well-defined structures of carbon-pure materials, in which carbon atoms are bonded in specific ways.
- Carbon shows allotropic forms like Diamond, graphite, Fullerene.
- Graphite:
- Graphite is a good conductor of heat and electricity.
- It is very soft and slippery and for this reason, graphite is used as a lubricant in the machine running at high temperatures, where oil cannot be used as a lubricant.
- Every carbon atom in graphite is bonded to three other carbon atoms in such a way that a layered hexagonal structure is formed.
- Diamond:
- Diamond has a high density of 3.51 gm due to its three-dimensional giant structure.
- It is a bad conductor of electricity.
- Diamond is the hardest substance on earth.
- It is used as an abrasive for sharpening hard tools.
- Fullerenes are used as conductors.
- It can be used as an absorber of gases.
- Fullerenes are used as lubricants.
- Some forms of fullerenes are used in making cosmetics-related ingredients.
- Graphite:
Last updated on Jul 8, 2025
->UPSC NDA Application Correction Window is open from 7th July to 9th July 2025.
->UPSC had extended the UPSC NDA 2 Registration Date till 20th June 2025.
-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.
->The NDA exam date 2025 has been announced. The written examination will be held on 14th September 2025.
-> The selection process for the NDA exam includes a Written Exam and SSB Interview.
-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100.
-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential.