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प्रश्न
Observe the diagram given below and answer the questions:
- Name the reactants in this reaction.
- Which gas comes out as effervescence in the bigger test tube?
- What is the colour change in the lime water?
- In the above experiment instead of sodium carbonate which chemical can be used to get same products?
- Write the use of acetic acid.
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उत्तर
- The reactants are acetic acid CH3COOH and sodium carbonate Na2CO3.
- The gas produced is carbon dioxide CO2.
- When carbon dioxide gas is passed through lime water, it turns lime water milky or cloudy due to the formation of calcium carbonate. Therefore, the colour change in the limewater would be from clear to milky.
- In the above experiment, instead of sodium carbonate, sodium bicarbonate can be used to get the same products.
- Acetic acid is widely used in the culinary arts as a key ingredient in vinegar. It is also used industrially as a chemical reagent for the production of chemical compounds, in the manufacture of plastics, and in the food industry as a preservative and flavouring agent.
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संबंधित प्रश्न
Complete the following chemical equations: CH3COOH+NaHCO3→
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 the functional group present in an organic compound which gives brisk effervescence with NaHCO3.
An organic compound X of molecular formula C2H4O2 gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X.
State any two uses of esters.
Write the IUPAC name of the following:
\[\begin{array}{cc}
\ce{CH3}\\
|\\
\ce{CH3 -C -CH3}\\
|\\
\ce{CH3}
\end{array}\]
Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.
If you are asked to report your observations about the following two properties of acetic acid, what would you report?
(i) Odour
(ii) Effect on litmus
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.
A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:
(A) no reaction in the test tube
(B) colourless gas with pungent smell
(C) bubbles of a colourless and odourless gas
(D) white fumes with smell of vinegar
On adding 2 mL acetic acid to 2 mL of water in a test tube, it was observed that
(A) a clear and transparent solution is formed
(B) a white precipitate is formed almost immediately
(C) two separate layers were formed
(D) a colourless and odourless gas is evolved
Give the structural formula of Acetic acid.
Draw the structural formula of a compound with two carbon atoms in the following case:
An alkane with a carbon to carbon single bond.
State how the following conversion can be carried out:
Ethyl chloride to Ethene.
Write a balanced chemical equation for the following:
A mixture of sodalime and sodium acetate is heated.
Give a balanced chemical equation for the following conversion:
Calcium carbide to ethyne.
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes
Explain the following reaction with an example.
Saponification
Write the chemical equation for the following:
Saponification Reaction
Raina while doing certain reactions observed that heating of substance ‘X’ with a vinegar-like smell with a substance ‘Y’ (which is used as an industrial solvent.) in the presence of conc. Sulphuric acid in a water bath gives a sweet-smelling liquid ‘Z’ having molecular formula C4H8O2. When heated with caustic soda (NaOH), ‘Z’ gives back the sodium salt and the compound ‘Y’.
Identify ‘X’, ‘Y’, and ‘Z’. Illustrate the changes with the help of suitable chemical equations.
