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Halogens react with alkenes to form haloalkanes. Addition of the bromine in this case occurs across the double bond in cyclohexene. The resultant products are colourless hence the brown colour disappears.

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What short chemical test could you make on the product to indicate whether cyclohexene is present or absent?

One simple test to determine the presence of cyclohexene would be to perform a bromine water test. Add a few drops of bromine water to the product; if cyclohexene is present, the red-brown color of the bromine water will disappear due to addition reaction with the cyclohexene. If the color remains, it indicates that cyclohexene is absent.


What is the colour of the bromine with the cyclohexene?

Bromine is reddish-brown in color. When it reacts with cyclohexene, the solution initially turns from red to colorless as the bromine adds across the double bond, forming a dibromo compound.


Equation of cyclohexene and bromine water?

When cyclohexene reacts with bromine water, the bromine molecule adds across the C=C double bond to form a dibromide product. The reaction is a test for the presence of carbon-carbon double bonds (alkenes), as the reddish-brown color of bromine water decolorizes upon addition to an alkene due to the formation of the colorless dibromide product.


What color is bromine gas?

Bromine gas has a reddish-brown color.


What is the color of gaseous bromine?

Kind of Red/Brown, or rust color, but vibrant.


What color is bromine water?

Bromine water is a reddish-brown color.


What is color bromine?

Bromine is a deep red-brown colored liquid at room temperature. Its color is due to the absorption of light in the visible spectrum, particularly in the red wavelengths.


Is bromine gas red?

It is a reddish-brown colour.


What color is 2 percent bromine solution?

2 percent bromine solution typically has a reddish-brown color.


What is the color of metal bromine?

Bromine is not a metal, it is a non-metal. Its colour is Reddish brown


What colour is the solid of bromine?

The solid form of bromine is a reddish-brown color.


What does bromine look like in its color in natural state?

It is a redish brown color.