What happens to an orange dichromate solution during the oxidation of alcohols?

What happens to an orange dichromate solution during the oxidation of alcohols?

• A. It turns blue
• B. It remains unchanged
• C. It turns green
• D. It becomes colorless

Answer: (C)

During the oxidation of alcohols using an orange dichromate solution, the solution turns green. This color change occurs because the chromium in the dichromate ion (Cr2O7^2-) is reduced as it oxidizes the alcohol. In the reaction, the orange solution of dichromate, which contains chromium in a +6 oxidation state, gets converted to chromium in a +3 oxidation state, resulting in the formation of green chromium ions (Cr^3+). The transition from the vibrant orange to green is a key visual indicator of the progress of the oxidation process. The remaining options do not accurately represent the chemical changes taking place during this reaction. The solution does not retain its original orange color, nor does it become colorless or turn blue, making the option that indicates a color change to green the correct answer.

During the oxidation of alcohols using an orange dichromate solution, the solution turns green. This color change occurs because the chromium in the dichromate ion (Cr2O7^2-) is reduced as it oxidizes the alcohol.

In the reaction, the orange solution of dichromate, which contains chromium in a +6 oxidation state, gets converted to chromium in a +3 oxidation state, resulting in the formation of green chromium ions (Cr^3+). The transition from the vibrant orange to green is a key visual indicator of the progress of the oxidation process.

The remaining options do not accurately represent the chemical changes taking place during this reaction. The solution does not retain its original orange color, nor does it become colorless or turn blue, making the option that indicates a color change to green the correct answer.