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InterviewSolution
| 1. |
Metals are good thermal conductors and electrical conductors. 'How the above said properties vary in case of diamond and graphite, which are allotopes of the non-metallic element carbon ? |
| Answer» Solution :Thermal conductivity and electrical conductivity of metals are attributed to CLOSE packing in metals and the presence of free electorns in the metal LATTICE respectively. Though diamond and graphite are allotropes of CARBON, diamond is a good thermal conducotr due to its rigid three- DIMENSIONAL structure, in which carbon atoms are CLOSELY and regualrly arranged. Diamond is a not good electrical conductor as there are no free electrons in the structure. Graphite on the other hand has free electrons in the layer lattice structure which makes it a good electrical conductor. Graphite is a bad thermal conductor. | |