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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
While studying saponification reaction, a student measures the temperature of the reaction mixture and also finds its nature using blue/red litmus paper. On the basis of his observations the correct conclusion would be
(A) the reaction is exothermic and the reaction mixture is acidic.
(B) the reaction is endothermic and the reaction mixture is acidic.
(C) the reaction is endothermic and the reaction mixture is basic.
(D) the reaction is exothermic and the reaction mixture is basic.
A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation foe the reaction.
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
Fill in the blanks from the choices given within brackets:
The basicity of acetic acid is-------- (3, 1, 4).
What is the common name of ethanoic acid?
Give the name and structural formula of one homologue of HCOOH.
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.
Why is the conversion of ethanol into ethanoic acid an oxidation reaction?
The organic acid present in vinegar is ______.
Name the reducing agent used to convert acetic acid into ethanol.
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.
Which one of the following are the correct observations about acetic acid?
(A) It turns blue litmus red and smells like vinegar
(B) It turns blue litmus red and smells like burning sulphur
(C) It turns res litmus blue and smells like vinegar
(D) It turns red litmus blue and has a fruity smell
Acetic acid smells like:
(1) a banana
(2) vinegar
(3) an orange
(4) a lemon
Explain the following term with example.
Monomer
Write a balanced equation for the following:
Write the equation for the preparation of ethylene from ethyl alcohol.
What type of compound is formed by the reaction between acetic acid and an alcohol?
Write a fully balanced equation for the folowing case:
Acitic acid is warmed with ethanol in the presence of concentrated sulpheric acid.
State how the following conversions can be carried out:
Ethene to Ethyl alcohol.
Ethanoic acid _________.
Anita added a drop each of diluted acetic acid and diluted hydrochloric acid on pH paper and compared the colors. Which of the following is the correct conclusion?
