Question Detail

CHM 102 Alkynes: Structure, Bonding, and Nomenclature Objective Question
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Question

What is the product when a terminal alkyne is treated with Cu2Cl2 in NH4OH?
Options
A White precipitate of silver acetylide
B Red precipitate of copper(I) acetylide
Correct Answer
C Blue solution
D No reaction
Correct Answer

Option B is the correct answer.

Detailed Explanation

Terminal alkynes form insoluble copper(I) acetylides (red precipitate) with ammoniacal cuprous chloride (Cu2Cl2/NH3), a test for terminal alkynes.

Hint

Copper acetylides are red or reddish-brown.

Question Info

Course: CHM 102
Topic: Alkynes: Structure, Bonding, and Nomenclature
Type: Objective
Difficulty: Not specified
Question 215 of 1999
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