What is the product formed when excess of ethanol reacts with concentrated sulphuric acid at 383 K and then the temperature of reaction mixture is increased to 443 K?a)Etheneb)Ethyl hydrogen sulphatec)Ethyl chlorided)Ethoxy ethaneCorrect answer is 'A'. Can you explain this answer?

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Ethene is...rytt as same ... equation is ..in NCERT..and the..product formed ...is ethene

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When alcohol react with H2SO4 at 443K temperature.then ethene is formed .
but instead of 443 ,at 413K ethers are formed.

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The reaction between excess ethanol and concentrated sulfuric acid at 383 K leads to the formation of ethene as the product. This reaction is known as dehydration of ethanol.

Dehydration of Ethanol:
- In the first step of the reaction, ethanol (C2H5OH) reacts with concentrated sulfuric acid (H2SO4) to form ethyl hydrogen sulfate (C2H5HSO4) as an intermediate product. This reaction is an example of an acid-catalyzed reaction.
- The reaction can be represented as follows:
C2H5OH + H2SO4 → C2H5HSO4 + H2O
- The intermediate product, ethyl hydrogen sulfate, is formed due to the protonation of the hydroxyl group (-OH) of ethanol by the sulfuric acid.
- The reaction mixture is heated to 443 K in the second step to facilitate the elimination of water (dehydration) from the intermediate product.
- The ethyl hydrogen sulfate undergoes elimination reaction, losing a water molecule to form ethene (C2H4) as the final product.
- The reaction can be represented as follows:
C2H5HSO4 → C2H4 + H2SO4
- The acidic conditions provided by sulfuric acid promote the elimination of water and the formation of ethene.
- Ethene is an unsaturated hydrocarbon with a double bond between the two carbon atoms. It is a colorless gas and is commonly used as a starting material in the production of various chemicals.

Summary:
- When excess ethanol reacts with concentrated sulfuric acid at 383 K, ethyl hydrogen sulfate is formed as an intermediate product.
- When the temperature of the reaction mixture is increased to 443 K, water is eliminated from the intermediate product to form ethene as the final product.
- Ethene is an unsaturated hydrocarbon with a double bond between the two carbon atoms.

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