What happen when benzene is heated with conc H2SO4 at 250?

Heating benzene with conc. sulphuric acid for a few hours results in the formation of benzenesulphonic acid. This reaction is an electrophilic substitution reaction.

Which of the following on heating with conc H2SO4 gives benzene?

benzenesulphonic acid
H2SO4 gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason : Sulphonation is a reversible process.

Does benzene react with sulfuric acid?

The electrophilic substitution reaction between benzene and sulfuric acid. There are two equivalent ways of sulfonating benzene: Heat benzene under reflux with concentrated sulfuric acid for several hours. Warm benzene under reflux at 40°C with fuming sulfuric acid for 20 to 30 minutes.

What happens when benzene is heated with concentrated h2 S o4 at 25 degree Celsius?

Answer: Benzene when treated with concentrated nitric acid and sulfuric acid at 330K temperature it forms nitrobenzene that is nitration occurs. The reaction is highly explosive and risky as a lot of heat is evolved during the reaction.

When sulphonic acid is heated in presence of steam What is formed?

benzene sulphonic acid
H2SO4 gives benzene sulphonic acid which when heated with superheated steam under pressure gives benzene.

What is the action of H2SO4 on benzene?

The mechanism for Sulfonation of benzene Due to higher electronegativity, oxygen present in sulphuric acid pulls an electron towards itself, generating an electrophile. This attacks the benzene ring, leading to the formation of benzenesulfonic acid.

What happens when benzene is treated with conc H2SO4 at 373K?

Conc. HNO3 +Conc. H2SO4 (nitrating mixture) reacts with benzene to give nitrobenzene at 323Kand m-dinitrobenzene at 373K.

Is toluene soluble in H2SO4?

The solubility of benzene and toluene in aqueous sulfuric acid > 75 wt-\% has been determined at 5, 25 and 45°. The benzene to toluene activity coefficient ratio is slightly greater than unity.

What happens when benzene is heated with H2SO4 and HNO3?

When benzene is heated with concentrated sulfuric acid ( H 2 SO 4) and concentrated nitric (HNO 3) acid, nitrobenzene is given as the product. A hydrogen atom of benzene is replaced by a nitro group (-NO 2) in this reaction. In this tutorial, we will learn followings.

How do you convert benzene to benzene sulphonic acid?

Benzene will be converted in benzene sulphonic acid via electrophilic addition reaction. In this reaction active species is SO3 and also the electrophile. The reaction goes better if you heat to 330 C and use fuming sulfuric acid (concentration H2SO4 + SO3).

Why is benzene nitration a very dangerous reaction?

This reaction is a very dangerous reaction because benzene nitration is an exothermic reaction (reaction releases large heat to the outside environment. . Heat of the reaction is -117 kJ/mol. Concentrated H 2 SO 4 and HNO 3 acids mixture is called as a nitrating mixture.

How do you make nitrobenzene?

The replacement of a hydrogen atom in the benzene ring by a nitro group (-NO 2) is called nitration. Benzene is heated with concentrated nitric acid and sulfuric acid about 330K temperature to obtain nitrobenzene. Water is given as a by-product.