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Which compound reacts to form a ketone when warmed with an acidified solution of potassium dichromate(VI)? A CH₃CH₂CH₂OH B (CH₃)₂CHOH C CH₃CH₂CHO D (CH₃)₂COOH - AQA - A-Level Chemistry - Question 25 - 2020 - Paper 3
Question 25
Which compound reacts to form a ketone when warmed with an acidified solution of potassium dichromate(VI)? A CH₃CH₂CH₂OH B (CH₃)₂CHOH C CH₃CH₂CHO D (CH₃)₂COOH
Worked Solution & Example Answer:Which compound reacts to form a ketone when warmed with an acidified solution of potassium dichromate(VI)? A CH₃CH₂CH₂OH B (CH₃)₂CHOH C CH₃CH₂CHO D (CH₃)₂COOH - AQA - A-Level Chemistry - Question 25 - 2020 - Paper 3
Step 1
Which compound reacts to form a ketone?
Answer
To determine which compound will react with potassium dichromate(VI) to produce a ketone, we need to analyze the given options:
- Option A: CH₃CH₂CH₂OH - This is a primary alcohol and will oxidize to an aldehyde, not a ketone.
- Option B: (CH₃)₂CHOH - This is a secondary alcohol. When heated with potassium dichromate(VI), it can be oxidized to form a ketone.
- Option C: CH₃CH₂CHO - This is an aldehyde. It does not react to form a ketone but can further oxidize to a carboxylic acid.
- Option D: (CH₃)₂COOH - This is a carboxylic acid and will not form a ketone upon further oxidation.
Based on the analysis, the correct answer is B: (CH₃)₂CHOH, as secondary alcohols are the compounds that will oxidize to form ketones.