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Which of the following statements are tr...

Which of the following statements are true ?

A

graphite is an electronic conductor.

B

`Na//liqNH_3` is a mixed conductor.

C

Si-Ga' allows in a semiconductor

D

Aqueous urea solution is not a conductor.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
A) `C_("graphite")` is good conductor due to availability of free electron (`sp^(2)` hybridisation )
B) `Na//LiqNH_3` is a mixed conductor due to having ammoniated electrons
C) `Si-Ga` allows in a semiconductor partially conduct electricity small gap between conduction band and valanceband
D) aq urea is not a conductor
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