The correct decreasing order for acid strength is :

  • Option 1)

    NO_{2}CH_{2}COOH> FCH_{2}COOH> CNCH_{2}COOH> CICH_{2}COOH

     

  • Option 2)

    FCH_2COOH>NCCH_2COOH>NO_2CH_2COOH>CICH_2COOH

  • Option 3)

    CNCH_2COOH>O_2NCH_2COOH>FCH_2COOH>CICH_2COOH

  • Option 4)

    NO_2CH_2COOH>NCCH_2COOH>FCH_2COOH>CICH_2COOH

Answers (1)
A admin

 

Acidic strength of carboxylic acid -

–  More acidic than phenols or alcohols.

–  Acidity increase with the presence of a group with  -I effect in the alkyl group.Whereas it decreases with the presence of  +I group.

–  Acidity increases with increase in the number of halogen atoms on \alpha - position.

–  It decreases with increasing distance of halogen from  -COOH 

–  It increases with increase in the electronegativity of halogen.

-as we know EWG order NO_{2}^{-}> NC^{-}> F^{-}> Cl^{-}

EWG group increases acidic strength

NO_{2}CH_{2}COOH> NCCH_{2}COOH> FCl_{2}COOH> ClCH_{2}COOH

 

 


Option 1)

NO_{2}CH_{2}COOH> FCH_{2}COOH> CNCH_{2}COOH> CICH_{2}COOH

 

Option 2)

FCH_2COOH>NCCH_2COOH>NO_2CH_2COOH>CICH_2COOH

Option 3)

CNCH_2COOH>O_2NCH_2COOH>FCH_2COOH>CICH_2COOH

Option 4)

NO_2CH_2COOH>NCCH_2COOH>FCH_2COOH>CICH_2COOH

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