`H_2O_2 + Ti^(4+) + 2H_2O to` orange colour. The orange colour is due to formation of

Options

A. `TiO_2`
B. Titanic acid
C. Titanium peroxide
D. Pertitanic acid

Answer

To solve the question regarding the formation of an orange color complex when hydrogen peroxide (H₂O₂) reacts with titanium ions (Ti⁴⁺) and water (H₂O), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants in this reaction are hydrogen peroxide (H₂O₂), titanium ions in the +4 oxidation state (Ti⁴⁺), and water (H₂O).

2. **Understand the Reaction**: When H₂O₂ is added to Ti⁴⁺ in an aqueous solution, it can act as an oxidizing agent. The titanium ions can form complexes with the peroxide.

3. **Formation of the Complex**: The reaction leads to the formation of a complex known as per-titanic acid. This complex can be represented as TiO₂(H₂O)₂, where titanium is at the center, surrounded by oxygen from the peroxide and water molecules.

4. **Color of the Complex**: The complex formed, per-titanic acid, is known to exhibit an orange color. This color is characteristic of certain titanium complexes, particularly those involving Ti⁴⁺.

5. **Conclusion**: Therefore, the orange color observed in the solution is due to the formation of per-titanic acid from the reaction of hydrogen peroxide with titanium ions in the presence of water.

### Final Answer:
The orange color is due to the formation of per-titanic acid.