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प्रश्न
Shristi heated Ethanol with a compound A in presence of a few drops of concentrated sulphuric acid and observed a sweet smelling compound B is formed. When B is treated with sodium hydroxide it gives back Ethanol and a compound C.
- Identify A and C
- Give one use each of compounds A and B.
- Write the chemical reactions involved and name the reactions.
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उत्तर
- A - Ethanoic acid/ Or any other carboxylic acid,
C - Sodium salt of ethanoic acid/any other carboxylic acid/sodium ethanoate. - Use of A - dil solution used as vinegar in cooking/preservative in pickles.
Use of B - making perfumes, flavoring agent. - \[\ce{CH3COOH + C2H5OH ->[Conc H2SO4] CH3COOC2H5 + H2O}\]
\[\ce{CH3COOC2H5 + NaOH -> CH3COONa + C2H5OH}\]
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संबंधित प्रश्न
A student adds 2 mL of acetic acid to a test tube containing 2 mL of distilled water. He then shakes the test tube well and leaves it to settle for some time. After about 5 minutes he observes that in the test tube there is :
(A) a clear transparent colourless solution
(B) a clear transparent pink solution
(C) a precipitate settling at the bottom of the test tube
(D) a layer of water the layer of acetic acid
Name two oxidising agents which can oxidise ethanol to ethanoic acid.
A neutral organic compound is warmed with some ethanoic acid and a little of conc. H2SO4. Vapours having sweet smell (fruity smell) are evolved. What type of functional group is present in this organic compound?
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.
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
Explain the following term with an example.
Oxidant
Choose the correct answer:
Select the acid which contains four hydrozen atoms in it.
Write the chemical equation for the ethanol to ethanoic acid of an oxidation reaction.
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.
