List Two Uses of Esters. - Science

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List two uses of esters.

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Solution

Uses of Esters:-

  • Used as a flavouring agent.
  • Used in manufacturing perfumes.
Concept: Ethanoic Acid
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2013-2014 (March) Delhi Set 3

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RELATED QUESTIONS

Ethanoic acid has a .................... odour.
(a) Rotten eggs
(b) Pungent
(c) Vinegar-like
(d) Mild


The molecular formula of acetic acid is _________ .
(a) CH3COOH
(b) CH3 – CH3
(c) C6H6
(d) C2H4


When ethanol reacts with ethanoic acid in the presence of conc. H2SO4, a substance with fruity smell is produced. Answer the following:-

(i) State the class of compounds to which the fruity smelling compounds belong. Write the chemical equation for the reaction and write the chemical name of the product formed.

(ii) State the role of conc. H2SO4 in the reaction.


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


Name the following:

The distinctive reaction that takes place when ethanol is treated with acetic acid.


Choose the correct alternative and rewrite the following: 

Acetic acid ..................


When zinc powder is added to acetic acid ______________

(a) the mixture becomes warm
(b) a gas is evolved
(c) the colour of the mixture becomes yellow
(d) a solid settles at the bottom


What is the common name of ethanoic acid?

 

Give the common names and IUPAC names of the following compounds of  HCOOH.


Give the common names and IUPAC names of the following compounds of CH3COOH.


What type of compound is formed when a carboxylic acid reacts with an alcohol in the presence of conc. H2SO4?


What is the physical state of CH3COOH?


How is ethanoic acid obtained from ethanol? Write down the chemical equation of the reaction involved.


Consider the following organic compound:
CH3OH, C2H5OH, CH3COCH3, CH3COOH, C2H5COOH, C4H9COOC2H5, CH4, C2H6, CH3CHO, HCHO
Out of these compound:

Which compound is most likely to be sweet-smelling?


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.


How is acetic acid prepared from acetylene?


Acetic acid is a typical acid. Write one equation in case of its reactions with a metal?


Give two tests to show that CH3COOH is acidic in nature ?


Explain the following term with example.
Monomer


Explain the following term with example.

Reduction


Explain the following term with an example.

Oxidant


Why is pure acetic acid also known as glacial acetic acid?


Write a fully balanced equation for the folowing case:

Acitic acid is warmed with ethanol in the presence of concentrated sulpheric acid.


Give balanced chemical equations for the following conversion :

Ethanoic acid to ethyl ethanote


Identify the term or substance based on the descriptions given below:

Ice like crystals formed on cooling an organic acid sufficiently.


Draw the structure formula of ethyne.


Ethanoic acid _________.


Choose the correct alternative and rewrite the following:

Some acetic acid is treated with solid NaHCO3, the resulting solution will be _________________.


Rewrite the following statement by selecting the correct option.
The formula of ethanoic acid is _____________.


CH3–CH2–CHO : propanal : : CH3–COOH : _______


Write the molecular formula of the given compound.

Sodium ethanoate


Ester is a sweet-smelling compound.


Explain the following reaction with an example.

Esterification


Explain the following reaction with an example.

Saponification


Write the characteristics of ethanoic acid.


Observe the figure and write the answers to the following questions.

  1. Write the name of the reaction shown in the following figure.
  2. Write the above chemical reaction in the form of a balanced equation.
  3. Write the name of the product produced in the above reaction, write a use.
  4. Write the name of the catalyst used in the above reaction.

Write the answers to the questions by observing the following figure.

  1. Write the chemical reaction shown in the figure above in the form of a balanced equation.
  2. Write the name of the gas coming out of the large test tube in the above chemical reaction.
  3. Why do small bubbles appear in the small test tube?
  4. What is the change in colour of lime water?

Ethanoic acid turns ______ litmus to ______


Give the balanced chemical equation of the following reaction:

Neutralization of NaOH with ethanoic acid.


Give the balanced chemical equation of the following reaction:

Evolution of carbon dioxide by the action of ethanoic acid with NaHCO3.


Draw the structural diagram of: 

Ethanoic acid


In the presence of the acid catalyst, ethanoic acid reacts with ethanol and ______ ester is produced.


The reaction between acetic acid and sodium carbonate is shown in the following figure.

Answer the questions with the help of a diagram.

  1. Which gas does come out as effervescence in the big test tube?
  2. What is the colour change in the lime water present in the small test tube?
  3. Write the related reaction.

Ethanoic acid reacts with the basic salt, sodium carbonate, to form a salt, named ______, water and carbon dioxide gas.


Bubbles are seen in the test tube during the preparation of lime water.


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.


Give the balanced chemical equation of the following reaction:

Neutralization of NaOH with ethanoic acid.


Give the balanced chemical equation of the following reaction:

Oxidation of ethanol by acidified potassium dichromate.


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.


Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.


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