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| Q. |
Diamond is harder than graphite because of – |
| A. | difference in layers of atoms |
| B. | tetrahedral structure of diamond |
| C. | difference of crystalline structures |
| D. | None of these |
| Answer» A. difference in layers of atoms | |
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Explanation: Diamond is harder than graphite because diamond has a more complex structure. Diamond's structure is like many pentagons connected together, each pentagon sharing a side with another pentagon or each pentagon sharinga point with another pentagon. All the points are linked together in some way. Graphite's structure is very loose, with its bonds forming layers. |
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