which of the following oxides behaves as conductor or insulator depending upon temperature ?
(a)TiO
(b)`SiO_(2)`
(c)`TiO_(3)`
(d) MgO

Options

A. TiO
B. `SiO_(2)`
C. `TiO_(3)`
D. MgO

Explanation

To determine which of the following oxides behaves as a conductor or insulator depending on temperature, we will analyze each option provided:

### Step 1: Understand the properties of the oxides
We need to identify the behavior of each oxide with respect to temperature changes. Some oxides can exhibit metallic or insulating properties based on the temperature due to changes in the energy gap between the conduction band and the valence band.

### Step 2: Analyze each oxide
- **(a) TiO (Titanium Oxide)**: Generally behaves as a semiconductor but does not show significant changes in conductivity with temperature variations to the extent of being classified as a conductor or insulator.

- **(b) SiO2 (Silicon Dioxide)**: This oxide is a well-known insulator and does not conduct electricity. Its properties do not change significantly with temperature in terms of conductivity.

- **(c) TiO3 (Titanium Trioxide)**: This oxide can exhibit both metallic and insulating properties depending on the temperature. It has a variable energy gap that changes with temperature, allowing it to behave differently under varying thermal conditions.

- **(d) MgO (Magnesium Oxide)**: This oxide is a good insulator and does not exhibit significant changes in conductivity with temperature.

### Step 3: Conclusion
From the analysis, we find that **TiO3 (option c)** is the oxide that behaves as a conductor or insulator depending on temperature.

### Final Answer:
The correct answer is **(c) TiO3**.

---