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Solution


Q.

Given below are two statements:

Statement–I : Primary aliphatic amines react with HNO2 to give unstable diazonium salts.

Statement–II : Primary aromatic amines react with HNO2 to form diazonium salts which are stable even above 300 K.

In the light of the above statements, choose the most appropriate answer from the options given below:                   [2022]
1 Both statement–I and statement–II are correct.  
2 Both statement–I and statement–II are incorrect.  
3 Statement–I is correct but statement–II is incorrect.  
4 Statement–I is incorrect but statement–II is correct.  

Ans.

(3)

Primary aliphatic amines react with nitrous acid to form aliphatic diazonium salts which are unstable while aromatic amines react with nitrous acid at low temperature (273–278 K) to form diazonium salts, a very important class of compounds used for synthesis of a variety of aromatic compounds.