Which onr of the following statements is wrong ?A. The conductivity of metals decreases with increase in temperatureB. The conductivity of semiconductors increases with increase in temperatureC. There is no superconductor at room temper -tureD. Ionic solids conduct electricity due to presence of ions .

Which onr of the following statements is wrong ?A. The conductivity of

1.	Which onr of the following statements is wrong ?A. The conductivity of metals decreases with increase in temperatureB. The conductivity of semiconductors increases with increase in temperatureC. There is no superconductor at room temper -tureD. Ionic solids conduct electricity due to presence of ions .
Answer» Correct Answer - D Ionic solids conduct electricity not due to presence of ions but due to presence of defects .

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