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The band gap at 300K of crystals A, B, C...

The band gap at 300K of crystals A, B, C, D is 5.5, 1.2, 0.67 and 0.1 units respectively. Answer the fol lowing questions based on this information.In the above case, which crystal will have the highest electrical conductivity at 300K? Why?

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Crystal D. Because it has least band gap energy
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