NCERT Class XI Chemistry The p-Block Elements Solutions
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Question : 12
Total: 38
Explain the difference in properties of diamond and graphite on the basis of their structures.
Solution:
| Criterion | Diamond | Graphite |
|---|---|---|
| Hybridisation | | |
| Structure of C | Tetrahedral carbon which gives rise to a 3-dimensional structure. | Planar trigonal which gives rise to a 2-dimensional sheet like structure of carbon. |
| C — C | 154 pm | 141.5 pm |
| Hardness | Due to 3-D structure, diamond is the hardest natural element on the earth. | It is made up of 2-D sheets of carbon which slip over each other. This gives graphite a slippery surface. |
| Electrical Conductivity | Diamond is an insulator. | Graphite is a good conductor of electricity due to presence ofdelocalised π-electrons. |
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