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प्रश्न
Write the answers to the questions by observing the following figure.
- Write the chemical reaction shown in the figure above in the form of a balanced equation.
- Write the name of the gas coming out of the large test tube in the above chemical reaction.
- Why do small bubbles appear in the small test tube?
- What is the change in colour of lime water?
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उत्तर
- Balanced equation of the reaction between acetic acid and sodium carbonate is as follows:
\[\ce{\underset{\text{Acetic acid}}{2CH3COOH_{(aq)}} + \underset{\text{carbonate}}{\underset{\text{Sodium}}{Na2CO_{3(s)}}} -> \underset{\text{ethanoate}}{\underset{\text{Sodium}}{2CH3COONa_{(aq)}}} + \underset{\text{Water}}{H2O_{(l)}} + \underset{\text{Carbon dioxide}}{CO2\uparrow}}\] - The gas formed in the large test tube is carbon dioxide (CO2) gas.
- The carbon dioxide gas produced in big test tube passes through bent gas delivery tube to the small test tube containing lime water. Hence, bubbles are seen in the small test tube.
- Lime water turns milky.
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संबंधित प्रश्न
In order to study saponification reaction, we first prepare 20% solution of sodium hydroxide. If we record the temperature of this solution just after adding sodium hydroxide flakes to water and also test its nature using litmus, it may be concluded that the process of making this solution is
(A) exothermic and the solution is alkaline
(B) endothermic and the solution is alkaline
(C) endothermic and the solution is acidic
(D) exothermic and the solution is acidic
Complete the following chemical equation:
\[\ce{CH3COOC2H5 + NaOH ->}\]
Fill in the blanks from the choices given within brackets:
The basicity of acetic acid is-------- (3, 1, 4).
Draw the structure of butanoic acid.
An organic compound X of molecular formula C2H4O2 gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X.
An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.
(a) Identify X and Y. Also write their formulae showing the functional group present in them.
(b) Write a chemical equation for the reaction involved.
Under what conditions does ethane get converted to ethyl alcohol?
Write the important uses of acetic acid.
Fill in the blank with appropriate word/words.
Vinegar is a solution of about ________per cent ________in water.
Write a balanced equation for the following:
Write the equation for the preparation of ethylene from ethyl alcohol.
Write the chemical equation for the following:
Combustion of methane
State are relevant observations for following reactant:
Addition of ethyl alcohol to acetic acid in presence of conc. H2SO4
A compound X when treated with an organic acid Y (having vinegar-like smell) in the presence of the acid Z, forms a compound P which has a fruity smell.
- Identify X, Y and Z
- Write the structural formula of X and Y.
- What type of compound is P?
- Name the above reaction.
- If compounds X and Y both have 2 carbon atoms. Write the reaction.
CH3–CH2–CHO : propanal : : CH3–COOH : _______
What are catalysts?
In the presence of the acid catalyst, ethanoic acid reacts with ethanol and ______ ester is produced.
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.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
Name the oxidising agent used in the conversion of ethanol to ethanoic acid.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
