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प्रश्न
With a labelled diagram describe in brief an activity to show the formation of ester.
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उत्तर
The activity given below shows the formation of ester :
- Take 1 mL ethanol (absolute alcohol) and 1 mL glacial acetic acid along with a few drops of concentrated sulphuric acid in a test tube.
- Warm in a water-bath for at least five minutes as shown in the figure below.
- Pour into a beaker containing 20-50 mL of water.
- After some time, there will be the formation of a fruity smell compound. The compound formed is an ester.
The formation of the ester can be represented by the chemical reaction as:
\[\ce{\underset{\text{(Ethanoic acid)}}{CH3COOH} + \underset{\text{(Ethanol)}}{C2H5OH}->[conc. H2SO4] \underset{\text{(Ester)}}{CH3COOC2H5} + H2O}\]
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संबंधित प्रश्न
A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation foe the reaction.
When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a substance with fruity smell is produced. Answer the following:-
(i) State the class of compounds to which the fruity smelling compounds belong. Write the chemical equation for the reaction and write the chemical name of the product formed.
(ii) State the role of conc. H2SO4 in the reaction.
A gas is liberated immediately with a brisk effervescence, when you add acetic acid to sodium hydrogen carbonate powder in a test tube. Name the gas and describe the test that confirms the identity of the gas.
Why is the conversion of ethanol into ethanoic acid an oxidation reaction?
Name the substance used to change acetic acid to acetic anhydride?
In an experiment to study the properties of acetic acid a student takes about 2 mL of acetic acid in a dry test tube. He adds about 2 mL of water to it and shakes the test tube well. He is likely to observe that:
(A) the acetic acid dissolves readily in water
(B) the solution becomes light orange
(C) water floats over the surface of acetic acid
(D) acetic acid floats over the surface of water
Draw the structural formula of a compound with two carbon atoms in the following case:
An alkane with a carbon to carbon single bond.
The functional group present in acetic acid is ______.
Write a balanced chemical equation for the following:
A mixture of sodalime and sodium acetate is heated.
Give a chemical reaction in which a catalyst is used.
