The compound C3H4 has a triple bond, which is indicated by its reaction with____________?
Correct answer: D. Ammonical silver nitrate
- A. Bromine water
- B. Bayer's reagent
- C. Fehling solution
- D. Ammonical silver nitrate
Explanation
A triple bond in a terminal alkyne such as propyne, C3H4, is indicated by ammoniacal silver nitrate, which forms a precipitate of silver acetylide. Bromine water and Bayer's reagent show unsaturation generally, while Fehling solution is mainly a test for aldehydes, so students may wrongly choose bromine water.
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About Alkynes
Alkynes are unsaturated hydrocarbons containing a carbon-carbon triple bond, with sp-hybridised carbon atoms and a linear arrangement around the bond. The content includes nomenclature, preparation, acidity of terminal alkynes, and addition reactions with hydrogen, halogens, hydrogen halides and water, as well as oxidation.
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