Q3 of 33 Page 224

An organic compound (A) is widely used as a preservative in pickle and has a molecular formula C2H4O2. This compound reacts with ethanol to form a sweet smelling compound

(B).


(i) Identify the compounds A and B.


(ii) Name the process and write the corresponding chemical equation.


Given:

a) Organic compound has a molecular formula: C2H4O2


b) Used as a preservative.


c) Reacts with ethanol to form a sweet smelling substance.


(i) As the organic compound is a preservative, hence it is an acetic acid (ethanoic acid).


Ethanoic acid reacts with ethanol to form a sweet smelling substance called ester(B).


Thus, A is ethanoic acid and B is ester.


(ii) The reaction taking place:



The above process is called esterification.


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1

Write down the possible isomers and give their IUPAC names using the formula C4H10.

 2

Diamond is the hardest allotrope of Carbon. Give reason for its hardness.

 4

An organic compound (A) of molecular formula C2H6O on oxidation with alkaline KMnO4 solution gives an acid (B) with the same number of carbon atoms. Compound A is used as an antiseptic to sterilize wounds, in hospitals. Identify A and B. Write the chemical equation involved in the formation of B from A.

 5

C2H6O is the molecular formula for two compounds A and B. They have different structural formula.

i) What is this phenomenon known as?


ii) Give the structural formula of A and B.


iii) Write down their common and IUPAC names.


iv) Mention the functional groups of A and B.