Q34 of 80 Page 113

Explain giving chemical equation, how are esters prepared? Specify any one property and one use of esters.

Esters are prepared by the reaction of an acid and an alcohol in the presence of an acid catalyst. The reaction is called esterification reaction.



Esters are sweet smelling substances and hence are used in making perfumes and as flavouring agents.


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(i) What is black gold and how is it formed? (ii) Why coal and petroleum are considered as air pollutants?

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A substance (X) be oxidised to acetic acid (CH3COOH)? Name substance (X) and write two tests to demonstrate acidic nature of acetic acid.

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An organic compound X which is sometimes used as an antifreeze has the molecular formula C2H6O. X on oxidation gives a compound Y which gives effervescence with a baking soda solution. Identify X and Y. Write the chemical equation of reaction.

 36

Give a detailed explanation on the following.

Properties of acetic acid