Question

Choose the correct word/phrase from within the brackets to complete the sentence.
When acetaldehyde is oxidised with acidified potassium dichromate, it forms

• A. ester
• B. ethanol
• C. acetic acid

Answer 1

The correct option is C

acetic acid

Methanol:

1. Acetaldehyde, also known as Methyl aldehyde has the chemical formula $C{H}_{3}CHO$.
2. Potassium dichromate has the chemical formula $K_{2}C{r}_2{O}_7.$

Reaction:

1. When Acetaldehyde reacts with acidified Potassium dichromate, it undergoes oxidation.
2. Thus, the product formed is Acetic acid or Ethanoic acid $\left(C{H}_{3}COOH\right)$
3. The reaction is given below:

${\text{CH}}_3\text{CHO (l)}\stackrel{[}{\to }\left[O\right]\left]K_{2}C{r}_2{O}_7{\text{CH}}_3\text{COOH}\right(l)$

When acetaldehyde is oxidised with acidified potassium dichromate, it forms Acetic acid.