McqMate
| Q. |
Which one of the following is a good electrical conductor? |
| A. | Graphite |
| B. | Diamond |
| C. | Peat |
| D. | Charcoal |
| Answer» A. Graphite | |
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Explanation: Graphite is a good conductor of electricity because its electrons are delocalized or free to move around. Each carbon atom in graphite is directly linked to only three carbon atoms through covalent bonds. Therefore, out of the four valence electrons in a car-bon atom, only three are used for bonding and the fourth is relatively free and can move from one car-bon atom to the other. |
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