Which of these reagents can confirm the presence of a triple bond?

Explanation

Copper(I) chloride does not confirm the presence of a triple bond, rather it is ammoniacal cuprous chloride (Cu(NH3)2ClOH)(CuCl) that can be used to distinguish between double and triple bonds in unsaturated hydrocarbons. The test involves reacting the compound with ammoniacal cuprous chloride to see if a red precipitate forms. If a red precipitate forms, the compound is an alkyne and contains at least one triple bond. If no precipitate forms, the compound is an alkene and contains at least one double bond.

Bromine water can confirm the presence of a triple bond in an organic compound. This test is called the bromine test or the bromine water test.