The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

  • Option 1)

    – CONH2 , – CHO, – SO3H , – COOH

  • Option 2)

    – COOH , – SO3H , – CONH2 , – CHO

  • Option 3)

    – SO3H , – COOH , – CONH2 , – CHO

     

  • Option 4)

    – CHO , – COOH ,– SO3H , – CONH2

     

 

Answers (3)

As we learnt in

Seniority Table -

- wherein

Carboxylic acid is the senior most functional group.

 

 The priority order of functional groups are 

– COOH > – SO3H > – CONH2 >– CHO

Correct option is 2.


Option 1)

– CONH2 , – CHO, – SO3H , – COOH

This option is incorrect 

Option 2)

– COOH , – SO3H , – CONH2 , – CHO

This option is correct

Option 3)

– SO3H , – COOH , – CONH2 , – CHO

 

This option is incorrect

Option 4)

– CHO , – COOH ,– SO3H , – CONH2

 

This option is incorrect

N neha
A Aditya

Option 2 is correct

 

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