Question

Rutile is a mineral that contain titanium and oxygen. The structure can be described as a closed packed array of oxide ions with titanium in one half of the octahedral holes. What is the oxidation number of titanium?

• A. $-2$
• B. $+2$
• C. $-4$
• D. $+4$

Answer 1

The correct option is D $+4$

Rutile is a mineral composed primarily of titanium dioxide, $Ti{O}_2$. Rutile is the most common natural form of $Ti{O}_2$.
So, the oxidation state of $Ti=+4$.