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प्रश्न
The structural formula of an ester is :
Write the formula of the acid and the alcohol from which it is formed.
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उत्तर
he structural formula of the ester corresponds to the compound ethylethanoate (CH3COOC2H5). Esters are sweet smelling substances which are formed when an alcohol reacts with carboxylic acid in the presence of concentrated sulphuric acid.
(a) The formula of the ethanoic acid is CH3COOH.
(b) The formula of the alcohol (ethanol) is CH3-CH2-OH.
The chemical equation showing the reactants and the products is as follows:
`CH_3 COOH + CH_3 CH_2 OH` 
`CH_3 COOCH_2 CH_3 + H_2 O`
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संबंधित प्रश्न
In an experiment to study the properties of ethanoic acid, a student takes about 3 mL of ethanoic acid in a dry test tube. He adds an equal amount of distilled water to it and shakes the test tube well. After some time he is likely to observe that
(A) a colloid is formed in the test tube.
(B) the ethanoic acid dissolves readily in water.
(C) the solution becomes light orange.
(D) water floats over the surface of ethanoic acid.
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 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
Write the name and chemical formula of the simplest organic acid.
What is the common name of ethanoic acid?
Give the common names and IUPAC names of the following compounds of CH3COOH.
Give the common name and IUPAC name of C2H5OH.
propanol into propanoic acid?
Name the process in each case and write the equations of the reactions involved.
Give any two uses of ethanoic acid.
Name the compound formed when acetic acid and ethanol react together.
Which of the following observations is true about dilute solution of acetic acid?
(A) It smells like vinegar and turns red litmus blue
(B) It smells like onion and turns blue litmus red
(C) It smells like orange and turns red litmus blue
(D) It smells like vinegar and turns blue litmus red
Acetic acid smells like:
(1) a banana
(2) vinegar
(3) an orange
(4) a lemon
Under what conditions does ethane get converted to ethyl alcohol?
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes
Ethanoic acid _________.
Ketone : –CO– : : Ester : _______
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
Vinegar is a solution of ______.
Ester is formed by the reaction between ______.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
