Question

The presence of unsaturation in an organic compound can be tested with :

• A. schiff's reagent
• B. tollen's reagent
• C. fehling solution
• D. baeyer's reagent

Answer 1

Answer: (D)

baeyer's reagent

In an organic compound, unsaturation is due to the presence of double $(>C=C<)$ or triple $(–C\equiv C–)$ bonds in the molecule. The presence of unsaturation is tested by the method:

1. Baeyer's test (using $1\%$ alkaline potassium permanganate solution)
2. The organic compound is treated with an aqueous solution of alkaline potassium permanganate (Baeyer's reagent). The disappearance of the pink color of potassium permanganate shows the presence of unsaturation.