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प्रश्न
What happens when ethanol is heated with concentrated sulphuric acid at 170°C? Write the equation of the reaction which takes place.
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उत्तर
When ethanol is heated with concentrated sulphuric acid at 170oC, it gets dehydrated to form ethene (unsaturated hydrocarbon). This reaction is termed as dehydration reaction as it involves the removal of water molecules from the alcohol (ethanol). In this reaction, the concentrated sulphuric acid acts as a dehydrating agent.
The chemical equation for the above reaction is:
CH3CH2OH → CH2 =CH2 + H2O
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संबंधित प्रश्न
Write the molecular formula of ethanol.
What is the common name of methanal?
Fill in the following blank with suitable word:
The next higher homologue of ethane is ...............
Write the name of the following functional group:
What is meant by a functional group? Explain with an example.
Draw the structures for the following compounds:
Ethanal
Name one liquid carbon compound which is being used as an additive in petrol in some countries.
Give the lab. Prepared of methyl alcohol.
In a tabular form, differentiate between ethanol and ethanoic acid under the following heads:
(i) Physical state
(ii) Taste
(iii) NaHCO3 test
(iv) Ester test
Give two uses each of:
(i) Methane (ii) ethane
Name the following:
Oxidising agent used to convert ethanol to acetic acid.
Ethanol can be converted to ethene which can be changed to ethane.
Choose the correct word or phrase from the options given below to complete the following sentences:
The conversion of ethanol to ehane is an example of_________(dehydration, dehydrogenation)
Write a balanced chemical equation for the following:
Ethanol under high pressure and low temperature is treated with acidified potassium dichoromate.
How would you convert ethene into ethane?
The organic compound obtained as the end product of the fermentation of a sugar solution is ______.
Why is the conversion of ethanol to ethanoic acid considered an oxidation reaction? Write the oxidising agent used in the reaction involved.
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.
Ethanol is soluble in water in all proportions.
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.
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
