A simple chemical test to distinguish between acetone and 3-pentanone would be the reaction of the compounds with

Question

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The reaction of bromine with acetone (a methyl ketone) and 3-pentanone (a larger ketone) in the presence of aqueous hydroxide ion would produce different results due to the difference in reactivity between the two compounds. Acetone would undergo a rapid reaction with bromine to form a colorless dibromo compound. In contrast, 3-pentanone would react slower with bromine, and it would form a yellow dibromo compound. So, by observing the color of the product, we could easily distinguish between acetone and 3-pentanone.

A Simple Chemical Test to Distinguish Between Acetone and 3-Pentanone