Question

What happens when ethanol is heated at 443 K with excess of conc.$H_{2}S{O}_4$.

Answer 1

Hint: Ethanol is made spontaneously by yeasts fermenting sugars or by petrochemical processes including ethylene hydration. It's used as an antiseptic and disinfectant in medicine. It's used as a chemical solvent and in organic compound synthesis. Ethanol is a kind of petrol.

Complete answer:
In chemistry, a dehydration reaction (also known as Zimmer's Hydrogenesis) is a conversion that entails the removal of water from the reacting molecule or ion. Dehydration reactions, on the other hand, are typical mechanisms that are the inverse of hydration reactions. Sulfuric acid and alumina are two popular dehydrating agents used in organic synthesis. Heating also affects dehydration reactions.
Hydrolysis is a reversible reaction in which water is recombined with the two hydroxyl groups, resulting in the disaccharide reverting to monosaccharides.
Water is released from two separate reactants in the corresponding condensation reaction.
Many examples of dehydration reactions can be found in organic synthesis, such as dehydration of alcohols or sugars.
Dehydration occurs when ethanol is heated with concentrated sulphuric acid at 443 K, resulting in the formation of ethene. Concentrated sulphuric acid serves as a dehydrating agent in this reaction.
$\mathbf{C}{\mathbf{H}}_3\mathbf{C}{\mathbf{H}}_2\text{OH}\underset{\text{ conc}\text{. }{\text{H}}_2\text{S}{\text{O}}_4}{\stackrel{443\text{k}}{\to }}\text{C}{\text{H}}_2=\mathbf{C}{\mathbf{H}}_2+{\mathbf{H}}_2\text{O}$
An alkene is a hydrocarbon with a carbon–carbon double bond in chemistry. Alkene is sometimes used interchangeably with olefin, which refers to any hydrocarbon with one or more double bonds. Mono Alkenes are divided into two categories: terminal and internal. Terminal alkenes, also known as -olefins, are more useful.

Note:
Hydrocarbon cracking is used to make alkenes. Natural gas condensate components (primarily ethane and propane) are the most used raw materials in the United States and the Middle East, while naphtha is used in Europe and Asia. To generate a mixture of mostly aliphatic alkenes and lower molecular weight alkanes, alkanes are broken apart at high temperatures, mostly in the presence of a zeolite catalyst. The mixture is feedstock and temperature dependent, and fractional distillation is used to isolate it. This is mostly used in the production of small alkenes (up to six carbons).