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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 ?

Grade:12

2 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
Dear student

A solid not transparent to visible light and whose conductivity increases with temperature is formed by covalent binding.

Regards
Vikas TU
14149 Points
one year ago
Semiconductor -
Energy gap between valence band and conduction band is less than 3 e.v.
- wherein
1) Delta E{g} 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.

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