Question:
Give simple chemical tests to distinguish between the following pairs of compounds:
(1) \( \text{C}_6\text{H}_5\text{COCH}_3 \text{ and } \text{C}_6\text{H}_5\text{COCH}_2\text{CH}_3 \)
Give simple chemical tests to distinguish between the following pairs of compounds:
(1) \( \text{C}_6\text{H}_5\text{COCH}_3 \text{ and } \text{C}_6\text{H}_5\text{COCH}_2\text{CH}_3 \)
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Aldehydes react positively with Tollen's or Fehling's solution, while ketones do not react in this way. The Iodoform test helps distinguish methyl ketones from others by forming a yellow precipitate.
Updated On: Feb 19, 2025
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Solution and Explanation
Distinguishing Between Methyl Ketone and Ethyl Ketone: A simple test can be carried out using Iodoform Test. The reaction with iodine and sodium hydroxide will form a yellow precipitate of Iodoform (CHI) for methyl ketones, such as ace- tophenone (CHCOCH), but will not give this result for ethyl ketones, such as phenylethanecar- bonyl (CHCOCHCH).
C6H5COCH3 + I2 + NaOH → Iodoform (yellow precipitate)
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