Q20 of 26 Page 1

An aromatic compound A on treatment with ammonia followed by heating forms compound B which on heating with Br2 and KOH forms compound C having molecular formula C6H7N. Give the structures of A,B and C.


aniline


The final product ‘C’ is said to have the molecular formula C6H7N is aniline, which was obtained by treatment with Br2 and KOH(Hoffmann degradation). So ‘B’ has to be benzamide, which has been obtained by treatment with ammonia, so ‘A’ has to be benzoic acid.


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18

Write the reactions involved in the following:

(a) Aldol condensation


(b) Cannizzaro’s reaction


(c) Rosenmund reaction


 19

Give reasons for the following:

(a) Aldehydes and ketones have lower boiling points than corresponding alcohols.


(b) Chloroacetic acid is stronger than acetic acid.


(c) Formaldehyde does not take part in aldol condensation.


 21

(a) Identify the monomer in the following polymeric structure:


(b) Which one of the following is an Elastomer?


(c) On the basis of forces between their molecules in a polymer, to which class does polyester belong?


 22

Give one example for each of the following:

(a) An artificial sweetener whose use is limited to cold drinks.


(b) A non-ionic detergent.


(c) A pain reliever used for relief from severe pain like post-operative pain.