Which one of the following non-metals is not a poor conductor of electricity?
Which one of the following non-metals is not a poor conductor of electricity?
(a) Sulphur (b) Selenium (c) Bromine (d) Phosphorus
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(b) Sulphur is the best electrical insulating material known, with a resistivity of about 2 × 1023 μΩ-cm. The reason for this large resistivity is probably the electron traps produced by thermal breaking of S8 rings. Electrical conductivity of sulphur is 5.0 × 10–14 S m–1. Electrical conductivity of selenium is 8 × 106 S m–1. Electrical conductivity of bromine is 1.0 × 10–10 S m–1. Electrical conductivity of phosphorous 1.0 × 10–9 S m–1. Thus from this data it is clear that electrical conductivity of selenium is maximum.
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