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Answered 2011-01-26 15:48:05


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.

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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.

The alkyne reacts with bromine removing it from the aqueous solution.

All alkenes decolourise bromine water.

Actually no...ethane ( Alkane class in general ) decolourise bromine water due to the absence of the double bond ( C=C ) ethene (alkenes in general ) will decolourise the bromine water..

Yes they do that. They are reacting together.

Test both in bromine water. The unsaturated alkene will decolourise the bromine water.

It's because, bromine water, being a good oxidising agent oxidises SO2 to H2SO4.

Yes, just like the open chain alkenes.

Bromine reacts with the double / triple bonds giving typically a colourless compound. the bromine water therefore fades as the bromine reacts.

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.

Any Halogen gas; F2, Cl2,Br2,I2....

Ethanol doesn't react with bromine water.

Saturated hydrocarbon does not decolourise bromine water while unsaturated hydrocarbon decolourize it.

Bromine reacts with water to form a mixture of Hydrobromic Acid, HBr, and Hypobromous Acid, HBrO.

Bromine Water disappear thus forming Gluconic Acid

Propene is an alkene, whereas propane is an alkane. Thus, propene is an unsaturated molecule, having a carbon-carbon double bond. If you add bromine water, an aqueous solution of bromine, to the test tubes, you can tell which is propene, the alkene. The bromine reacts with and saturates the double bonds in alkenes, and so decolourises. The bromine does not decolourise when added to an alkane as it does not react. So, in conclusion:Add bromine water (brown) to the test tubesIf the bromine water stays brown, the test tube contains propaneIf the bromine water goes colourless, the test tube contained propene.

The ethene reacts with the bromine and the solution turns colourless (from its original orange colour).

When D- glucose is treated with bromine water - it oxides the terminal aldehyde to carboxylic acid and the major product is gluconic acid.

Firstly, there is a discharge of reddish brown colour due to bromine which then turns colourless.

As polyehtene is unsaturated(single bond) it does not react with bromine and there is no colour change.But bromine reacts with ethene and it becomes colourless.

The ethene doesnt change from orange to colourless as ethene is already colourless but the bromine water turns from orange to colourless.

Bromine, Br2, reacts with water to produce hypobromite, OBr-. The position of the equilibrium depends very much upon the pH of the solution. Br2(l) + H2O(l) ⇌ OBr-(aq) + 2H+(aq) + Br-(aq)

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.

all of the halogens: bromine, fluorine, oxygen, chlorine and iodine. and it is highly reactive with water.

Bromine is pure liquid bromine Bromine Water is bromine mixed with water

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