Ncert Exercises & Solutions

Which of the following oxides behaves as a conductor or insulator depending upon temperature?

1. TiO

2. SiO₂

3. TiO₃

4. MgO

Hint: Vanadium and titanium oxide show metallic or insulating properties depending upon temperature

Certain metal oxides like VO₂, VO, VO₃ and TiO₃ show metallic or insulating properties depending upon temperature. As

temperature varies metallic or insulating property varies. This is due to variation in the energy gap between the conduction band

and valence band.