During the chromic acid oxidation of isopropyl alcohol into acetone colour of the reaction mixture changes from yellow - orange to greenish blue . The greenish blue colour is because of

Options

A. Acetone
B. `H_(2)CrO_(4)`
C. `HCrO_(3)`
D. `Cr_^(3+)`

Explanation

To solve the question regarding the color change during the chromic acid oxidation of isopropyl alcohol into acetone, we can break down the process step by step:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactant in this reaction is isopropyl alcohol (C3H8O), which can be represented as CH3CHOHCH3.

2. **Identify the Oxidizing Agent**:
- The oxidizing agent used is chromic acid (H2CrO4). This compound is derived from chromium trioxide (CrO3) and sulfuric acid (H2SO4) and is commonly referred to as Jones reagent.

3. **Understanding the Oxidation Process**:
- In this reaction, isopropyl alcohol is oxidized to acetone (C3H6O). During this process, the chromium in chromic acid is reduced.

4. **Oxidation State Changes**:
- In chromic acid (H2CrO4), chromium is in the +6 oxidation state. When it acts as an oxidizing agent and oxidizes isopropyl alcohol, it gets reduced to chromium in the +3 oxidation state (Cr^3+).

5. **Color Change Observation**:
- The initial color of chromic acid (H2CrO4) is yellow-orange due to the presence of dichromate ions (Cr2O7^2-). As the reaction proceeds and chromium is reduced to Cr^3+, the color of the solution changes to greenish-blue.

6. **Conclusion**:
- The greenish-blue color observed in the reaction mixture is due to the formation of chromium ions in the +3 oxidation state (Cr^3+).

### Final Answer:
The greenish-blue color is because of the formation of chromium ions in the +3 oxidation state (Cr^3+) during the oxidation of isopropyl alcohol by chromic acid.

---