Question

A reagent used to test for unsaturation of alkene is

• A. cone. $ {{H}_{2}}S{{O}_{4}} $
• B. ammoniacaI $ C{{u}_{2}}C{{l}_{2}} $
• C. ammoniacal $ AgN{{O}_{3}} $
• D. solution of $ B{{r}_{2}} $ in $ CC{{l}_{4}} $

Answer 1

Answer: (D)

Ammoniacal $ AgN{{O}_{3}} $ and ammoniacal cuprous chloride are used to test the presence of terminal alkyne. $ B{{r}_{2}} $ in $ CC{{l}_{4}} $ is used to test the presence of unsaturation in organic compound. Organic compounds having double or triple bond decolourise the reddish/brown + colour of bromine water.