Correct Answer: Option C

Explanation

When ethanol reacts with excess acidified potassium dichromate (K\(_2\)Cr\(_2\)O\(_7\)), it gets oxidized to ethanoic acid (acetic acid), with the color of the solution changing from orange to green as the chromium ions are reduced during the oxidation process; this reaction is a common test for alcohols due to the visible color change. 

                CH\(_3\)CH\(_2\)OH  + K\(_2\)Cr\(_2\)O\(_7\) →  CH\(_3\)COOH

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