Why does phenol Decolourise bromine water but not benzene?

Benzene does not undergo “adding across the multiple bond” reactions which would destroy the delocalization. Benzene does undergo substitution reactions. If the reaction of benzene with bromine could produce phenyl bromide, the bromine water would be decolorized.

What condition does Decolourise bromine water?

Bromine water is an orange solution of bromine. It becomes colourless when it is shaken with an alkene. Alkenes can decolourise bromine water, but alkanes cannot.

Why is phenol more reactive with bromine than benzene?

Reaction with Bromine The increased reactivity compared to benzene is due to the lone pair of p-orbital electrons on the oxygen atom in the phenol group. The electron pair is delocalised into the ring structure, activating the ring.

What is the difference between phenol and benzene?

Benzene and phenol are aromatic organic compounds. Benzene is an organic compound having the chemical formula C6H6 while Phenol is a white crystalline solid with molecular formula C6H6OH. The key difference between benzene and phenol is that phenol has a –OH group in place of a hydrogen atom in benzene.

Does phenol give bromine water test?

If bromine water is added to a solution of phenol in water, the bromine water is decolorized and a white precipitate is formed which smells of antiseptic. With dilute nitric acid: Phenol reacts with dilute nitric acid at room temperature to give a mixture of 2-nitrophenol and 4-nitrophenol.

What kind of reaction is involved in bromination of phenol?

There are some methods for bromination of Phenol. It is basically a substitution reaction where bromine replaces the hydrogen present in the benzene ring of phenol. There are various methods for bromination of phenol. But the major ones are the use of Br2 and Bromine water.

When phenol reacts with Br2 water the major product obtained is?

With Br2 – H2O , phenol give s 2,4,6 – tribromophenol but with Br – CS2 , it gives 4 – bromophenol as the major product.

Which one of the following Cannot Decolourise the bromine water?

C3H8 (propane) is an alkane (saturated hydrocarbon) and hence it will not decolorize bromine water.

Why is bromine water orange?

Bromine water contains bromine molecules, Br2 , dissolved in water. Pure bromine has a very dark color, so bromine water should be yellowish to light orange in color. As you would image, the more dilute the solution is, the less dark its color will be.