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Benzene will not decolourise bromine water as it does not undergo addition reaction. It is highly saturated due to presence electron cloud above and below it.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoThis is because alkenes are unsaturated. They have a C=C double bond. Electrons just waiting to be taken.
Bromine is a halogen. It's dying to get just one more electron to fill its octet, so Br2 will attack the C=C and take some electrons in the form of a covalent bond.
Example:
H2C=CH2 + Br2 ---> H2BrC-CBrH2
Now each carbon has 4 bonds and Bromine has filled its octet. All's good.
Wiki User
∙ 10y agoAlkanes don't, ALKENEs do by chemically bonding with the Bromine across its double bond.
Alkanes only turn Bromine water colourless in the presence of sunlight. This is due to a photo-chemical reaction in which free radicals are formed. This reaction may also be called a substitution reaction.
Wiki User
∙ 13y agoyes this is because of the double c bond
C=C
Wiki User
∙ 10y agoIt's because, bromine water, being a good oxidising agent oxidises SO2 to H2SO4.
Wiki User
∙ 8y agoYes they do that. They are reacting together.
Wiki User
∙ 14y agoYes, just like the open chain alkenes.
Wiki User
∙ 13y agoAll alkenes decolourise bromine water.
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Why does alkyne decolourise bromine water?
The alkyne reacts with bromine removing it from the aqueous solution.
What test distinguishes between alkene and alcohol?
Baeyer's test for unsaturation using KMnO4 . if the sol'n retains the purple color of the reagent , then it is an alkane. if the color disappears with formation of brown precipitate ,it indicates presence of unsaturated HC
What is the observation between bromine and propene?
Bromine water is a dilute solution of bromine that is normally orange-brown in colour, but becomes colourless when shaken with an alkene. Alkenes can decolourise bromine water, while alkanes cannot.
When benzene reacts with bromine water will it decolourise bromine water or not?
No!! Benzene wont de colourise bromine water although it is an unsaturated compound ,as it is an aromatic compound and it does not undergo addition reaction.
Why the unsaturated compound decolourises with bromine?
bromine water is oxidising in nature. it removes the double bonds and attaches itself to the alkene.
What changes in color occur when bromine or KMnO4 reacts with an alkene?
The purple KMnO4 is decolourise
Why does alkyne decolourise bromine water?
The alkyne reacts with bromine removing it from the aqueous solution.
Chemical reaction between phenol and bromine water?
it cant decolourise
What simple chemical test will distinguish an alkane from others?
Use bromine water (Br2) or acidified permanganate (H+/MnO4-) With permanganate: add the permanganate to the alkane and no reaction will occur, add the permanganate to the alkene and you will form a diol the solution will also turn from purple to colourless. With bromine water: add the bromine water to the alkane (plus you need sunlight) and you get a substitution reaction, this is a slow reaction. Add the bromine water to the alkene and you get an immediate addition reaction (this one does not need sunlight). When bromine water reacts with an alkene it is decolourised, the reddish brown bromine water turns from brown to colourless. This is because alkenes are unsaturated and contain a carbon to carbon double bond. If you did the bromine water test in a dark place say a cupboard then the alkene would decolourise but the alkane wouldn't because it needs UV/sunlight in order to react. in practice the cupboard is not necessary as the speed of decolourisation is so much faster with the alkene.
What test distinguishes between alkene and alcohol?
Baeyer's test for unsaturation using KMnO4 . if the sol'n retains the purple color of the reagent , then it is an alkane. if the color disappears with formation of brown precipitate ,it indicates presence of unsaturated HC
What is the observation between bromine and propene?
Bromine water is a dilute solution of bromine that is normally orange-brown in colour, but becomes colourless when shaken with an alkene. Alkenes can decolourise bromine water, while alkanes cannot.
Will saturated oils decolourise bromine?
No, unsaturated oils and fats (sunflower oil, olive oil) decolourise when reacted with bromine
When benzene reacts with bromine water will it decolourise bromine water or not?
No!! Benzene wont de colourise bromine water although it is an unsaturated compound ,as it is an aromatic compound and it does not undergo addition reaction.
What is the different between saturated and unsaturated?
Saturated hydrocarbon does not decolourise bromine water while unsaturated hydrocarbon decolourize it.
Why the unsaturated compound decolourises with bromine?
bromine water is oxidising in nature. it removes the double bonds and attaches itself to the alkene.
Which one of the following tests will best allow you to distinguish between an aldehyde and an alkene?
bromine water
What is the reagent to distinguish alkene and alkyne?
Bromine
