Bromine water
Acidified KMnO4
Copper (I) chloride
Bromine gas
Explanation
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Discussions (30)
The answer is very correct.
Both Alkene (double bond) and Alkyne (triple bond) decolourize Bromine Water because they are both unsaturated hydrocarbon. Being more specific in the test for alkyne, Copper (I) Chloride or AgNO3 is used.
Here is an explanation:
The answer is a actually correct. Bromine water is used to test for unsaturated hydrocarbon(which could be alkene or alkyne). So this makes you kind of not sure after the test if you have an alkene or alkene.to test for terminal alkene, cucl or agno3 is used ND they give a white precipitate with terminal alkene. So this leaves the answer as the best option.check chemical properties of alkyne in ababio or any know chemistry textbook.
The correct answer is A. Copper(I) chloride β
Hereβs why:
Bromine water can detect unsaturation (double or triple bonds) because it gets decolorized, but it cannot distinguish between the two β both alkenes and alkynes will decolorize bromine water.
Copper(I) chloride in ammonia solution forms a reddish precipitate (copper(I) alkynide) specifically with terminal alkynes (βCβ‘CH), confirming the presence of a triple bond.
So the question is about confirming and not just detecting unsaturation, Copper(I) chloride is the better choice.
Sorry,bt d ans ought to be bromine water because unsaturated hydrocarbon(triple bond)decolourizes bromine water. THANKS
copper(I) chloride (CuCl) can be used in certain reactions involving alkynes (compounds with triple bonds), it's not as commonly employed as bromine water or bromine gas for specifically confirming the presence of a triple bond. The bromine test is a more standard method for this purpose. However, reactions involving copper(I) chloride may be used in different contexts.
Bromine Water and Acidified KMNO4 mostly identfies Alkene while CuCl identifies Alkyne in most cases 
My school please can you give a comprehensible explanation?
everybody voiced their opinions but i am still biased inspite of my personal researches
is it bromine water or copper(i)chloride?
Thank you all for your contributions. They are well appreciated.
Apologies please! Kindly note that the necessary correction has been made. You can also refer to your New School Chemistry by Osei Yaw Ababio to further confirm the explanation provided in the explanation above.
(See Substitution reaction of Alkyne and Test for unsaturation)
Copper (I) chloride, specifically in an ammoniacal solution (ammoniacal cuprous chloride), is used to confirm the presence of a triple bond in terminal alkynes. When it reacts with a terminal alkyne it forms a characteristic reddish-brown precipitate of copper (I) acetylide. This specific reaction allows chemists to distinguish a triple bond from a double bond, as alkenes do not produce this precipitate
the answer is C
I really don't get you people, how is it copper 1 chloride
How will I feel that I pass and you people just.
