Free Reactivity of Aldehydes and Ketones MCQs with Answers
11 Reactivity of Aldehydes and Ketones MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
11 questions · page 2 of 2
11. Acetaldehyde undergoes oxidation to produce acetic acid. In this reaction the oxidizing agent used is:
- A. HI
- B. LiAlH4
- C. K2Cr2O7
- D. NaBH4
Explanation: Acidified potassium dichromate is the standard oxidising agent for converting an aldehyde to a carboxylic acid, turning from orange to green as chromium is reduced from plus 6 to plus 3. Lithium aluminium hydride and sodium borohydride are reducing agents and would drive the reaction the other way, back towards the alcohol. Hydrogen iodide is a reducing agent as well.
Correct answer: K2Cr2O7