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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
Name one chemical compound which can be used to distinguish between ethanol and ethanoic acid.
When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
What do you notice when acetic acid reacts with litmus?
What do you notice when acetic acid reacts with alcohol?
A student is studying the properties of acetic acid. List two physical properties of acetic acid he observes. What happens when he adds a pinch of sodium hydrogen carbonate to this acid? Write any two observations.
A student adds 4 mL of acetic acid to a test tube containing 4 mL of distilled water. He then shakes the test tube and leaves it to settle. After about 10 minutes he observes:
(A) a layer of water over the layer of acetic acid
(B) a layer of acetic acid over the layer of water
(C) a precipitate settling at the bottom of the test tube
(D) a clear colourless solution
Explain the following term with example.
Monomer
Why is Soda lime used not only NaOH?
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
