Question
Question: Aldehydes and ketones cannot be distinguished by...
Aldehydes and ketones cannot be distinguished by
A
Molisch's test
B
Tollens' test
C
Benedict's test
D
Schiff's test
Answer
Molisch's test
Explanation
Solution
Molisch's test is designed for carbohydrates; neither aldehydes nor ketones are carbohydrates, so both generally give a negative result, making it unable to distinguish them. Tollens', Benedict's, and Schiff's tests specifically differentiate aldehydes (positive) from ketones (negative) due to the reducing nature of aldehydes or their specific reactivity.