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प्रश्न
How is ethene prepared from ethanol? Give the reaction involved in it.
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उत्तर
Ethene is prepared from ethanol by heating it at 443 K with excess concentrated sulphuric acid.
`underset("(ethanol)")("C"_2"H"_5"OH")overset("Conc"."H"_2"SO"_4)(->)underset("(ethene)")("CH"_2 = "CH"_2) + "H"_2"O"`
The concentrated sulphuric acid acts as a dehydrating agent which removes water from ethanol.
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संबंधित प्रश्न
Give two properties of ethanol.
Write the name and structural formula of the compound obtained when ethanol is heated at 443 K with excess of conc. H2SO4. Also write chemical equation for the reaction stating the role of conc. H2SO4 in it.
Write a balanced chemical equation for Burning of ethane in the plentiful supply of air.
What happens when ethanol is heated with concentrated sulphuric acid at 170°C? Write the equation of the reaction which takes place.
What happens when ethanol is oxidised with alkaline potassium permanganate (or acidified potassium dichromate)? Write the equation of the reaction involved.
How is the spurious alcohol obtained?
Identify the functional group of the HCHO ?
Identify the functional group of the CH3COOH ?
Write the name and molecular formula of an organic compound having its name suffixed with 'ol' and having two carbon atoms in its molecule. Write balanced chemical equation to indicate what happens when this compound is heated with excess conc. H2SO4 and the name of main product formed. Also state the role of conc. H2SO4 in the reaction.
how can we prepare ethane by reduction of a halogen compound?
Give three uses of ethanol
From the given list, name the homologue of the homologous series with the general formula CnH2n.
Convert ethanol into ethene using hot conc. H2SO4. Give only a balanced equation.
How would you convert ethene into ethane?
Write the structural formulae of the following compound:
Ethane
3 mL of ethanol is taken in a test tube and warmed gently in a water bath. A 5% solution of alkaline potassium permanganate is added to the first drop by drop to this solution, then in excess.
- How is a 5% solution of KMnO4 prepared?
- State the role of alkaline potassium permanganate in this reaction. What happens on adding it in excess?
- Write the chemical equation of this reaction.
Write the characteristics of ethanol.
100% pure ethanol is called ______.
Ethene is formed when ethanol at 443 K is heated with excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation of this reaction.
