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- Confused! kindly explain, A solid which is transparent to visible light and whose conductivity increases with temperature is formed by
A solid which is transparent to visible light and whose conductivity increases with temperature is formed by
- Option 1)
metallic binding
- Option 2)
ionic binding
- Option 3)
covalent binding
- Option 4)
van der Waals binding
Answers (1)
As we learnt in
Semiconductor -
Energy gap between valence band and conduction band is less than 3 e.v.
- wherein
1) lies between conductor & insulator
2) Both electron and holes are responsible for conductivity .
3) At 0 K behave like an insulator (Si,Ge)
This properly corresponds to semiconductor. Bond formed by semiconductor is covalent in nature.
Correct option is 3.
Option 1)
metallic binding
This is an incorrect option.
Option 2)
ionic binding
This is an incorrect option.
Option 3)
covalent binding
This is the correct option.
Option 4)
van der Waals binding
This is an incorrect option.
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