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Kerosene does not decolourise bromine water because it is a saturated hydrocarbon, meaning it lacks double or triple bonds that can react with bromine. In contrast, cooking oils contain unsaturated fatty acids, which have carbon-carbon double bonds. These double bonds can react with bromine, leading to the decolourisation of the bromine water as it forms brominated compounds. Thus, the presence of unsaturation in cooking oils is the key factor in this reaction.
What else can I help you with?
Are kerosene and oil soluble?
No. Kerosene is an organic compound. and water is a non-organic compound. (kerosene : non-polar Water : polar). As water is a polar solvent kerosene is not soluble in it. but kerosene is soluble in ethyl alcohol which is a non-polar solvent.
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.
Why kerosene float on water?
Kerosene is less dense than water, causing it to float on the surface. This is due to the difference in their molecular structures and the way their molecules interact with each other. The lighter kerosene molecules are unable to displace the heavier water molecules, leading to the kerosene floating on top.
Why is it not advisable to pour water on a kerosene caused fire?
Pouring water on a kerosene fire can spread the flames and cause the fire to intensify due to the kerosene's ability to float on top of the water. This can make the situation more dangerous and difficult to control. It is better to use a fire extinguisher or sand to smother the fire.
Is bromine water an electrolyte?
Bromine water is not considered an electrolyte. It is a solution of bromine (Br₂) in water, which does not dissociate into ions when dissolved. Electrolytes are substances that produce ions in solution and can conduct electricity, whereas bromine water primarily contains molecular bromine and does not provide the necessary ionic conductivity.
What is the different between saturated and unsaturated?
Saturated hydrocarbon does not decolourise bromine water while unsaturated hydrocarbon decolourize it.
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 does alkyne decolourise bromine water?
Alkynes can decolourize bromine water due to the addition reaction that occurs. The bromine molecules add across the carbon-carbon triple bond in the alkyne, forming a colorless dibromoalkane product. This reaction is specific to alkynes and does not occur with alkenes or alkanes.
Chemical reaction between phenol and bromine water?
The reaction between phenol and bromine water results in the substitution of a hydrogen atom on the benzene ring with a bromine atom. This forms bromophenol as the product. The reaction is a bromination reaction and the presence of phenol's hydroxyl group activates the benzene ring towards electrophilic substitution.
Do Alkene decolourise bromine water?
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.
What happens if you mix cooking oil with bromine water?
The bromine water turns from orange to colourless, as it is breaking the double bonds. When the oil becomes saturated, any more bromine water that is added will not turn colourless.
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.
What happens when kerosene oil and cooking oil are added to water why?
When kerosene oil and cooking oil are added to water, they both float on the surface and do not mix with the water. This occurs because both oils are less dense than water and hydrophobic, meaning they do not interact with water molecules. The different polarities of water and oil prevent them from forming a homogeneous mixture, resulting in distinct layers.
What colour is bromine gas?
Classic question. And although many things would, you're probably wanting the answer "alkenes".This 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-CBrH2Now each carbon has 4 bonds and Bromine has filled its octet. All's good.
Why kerosene floats on water?
kerosene floats on water because kerosene is less denser than water
Which liquid floats on top water or kerosene?
When water and kerosene are mixed kerosene will float on top.
What is the difference between bromine water and liquid bromine?
Bromine water is a solution of bromine in water, typically used as a reagent in chemical reactions to test for unsaturation in organic compounds. Liquid bromine is the pure elemental form of bromine, which is a dark red-brown liquid at room temperature and is highly reactive.
