| Q.4 and Q.5 are assertion-reason type. Choose the correct answer out of the following choices: |
| Assertion: Semi-conductors are solids with conductivities in the intermediate range from \[{{10}^{-6}}-{{10}^{4}}\,oh{{m}^{-1}}\,m\] |
| Reason: Intermediate conductivity in semiconductor is due to partially filled valence band. |
A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement.
D) Assertion is wrong statement but reason is correct statement.
Correct Answer: C
Solution :
The correct reason is that intermediate conductivity of semi-conductors is due to small energy gap between valence band (filled) and conduction band (empty band).
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