Which outcome occurs when the band gap energy of polycrystalline silicon decreases?

💡 Explanation

Increased electrical conductivity results from a smaller band gap energy barrier, because electrons require less energy for excitation into the conduction band through thermal excitation. Therefore, it becomes more conductive, rather than insulating or increasing electron-hole recombination; these are associated with different properties of the electronic band and impurities.

• Which outcome reduces yield in the Haber-Bosch process when reactants are rapidly cycled?
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