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प्रश्न
Explain the following reaction with an example.
Saponification
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उत्तर
When an ester is heated with dilute sodium hydroxide (an alkali) solution, it gets converted back to the original alcohol and sodium salt of the original carboxylic acid. Such a reaction is known as saponification.
\[\ce{Ester + Sodium hydroxide ->[Heat] Sodium carboxylate + Alcohol}\]
E.g. Ethyl ethanoate and sodium hydroxide react to give sodium ethanoate and ethanol.
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संबंधित प्रश्न
Ethanoic acid has a .................... odour.
(a) Rotten eggs
(b) Pungent
(c) Vinegar-like
(d) Mild
When you add about 2 ml of acetic acid to a test tube containing an equal amount of distilled water and leave the test tube to settle after shaking its contents, what will you observe in the test tube after about 5 minutes?
(A) A white precipitate settling at its bottom
(B) A clear colourless solution
(C) A layer of water over the layer of acetic acid
(D) A layer of acetic acid over the layer of water
You have four test tubes, A, B, C and D containing sodium carbonate, sodium chloride, lime water and blue litmus solutions respectively. Out of these the material of which test tube/ test tubes would be suitable for the correct test of acetic/ethanoic acid?
(a) only A
(b) A and B
(c) B and C
(d) A and D
Write the IUPAC names, common names and formulae of the first two members of the homologous series of carboxylic acids.
Write the formulae of ethanoic acid.
Three organic compounds A, B and C have the following molecular formulae: C4H10O
Which compound contains a carboxyl group? Write its name and structural formula.
Name one chemical compound which can be used to distinguish between ethanol and ethanoic acid.
The organic acid present in vinegar is ______.
Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.
A student is studying the properties of acetic acid in his school laboratory. List two physical and two chemical properties which he must observe and note in his record book.
Name the following:
A toxic alcohol
Draw the structural formula of a compound with two carbon atoms in the following case:
An alcohol containing two carbon atoms.
State how the following conversions can be carried out:
Ethyl chloride to Ethyl alcohol
When acetaldehyde is oxidized with acidified potassium dichromate, it forms ______.
Draw the structural formula for the following:
Ethanoic acid
A student while observing the properties of acetic acid would report that this smells like ______.
When ethanoic acid is treated with NaHCO^ the gas evolved is ______.
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.
