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(D) Electrical conductivity in an aqueous solution depends on the concentration of ions present. Stronger acids dissociate more completely,leading to

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$0.1\, M$ difluoroacetic acid

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(D) Electrical conductivity in an aqueous solution depends on the concentration of ions present. Stronger acids dissociate more completely,leading to a higher concentration of ions. The acidity of carboxylic acids increases with the presence of electron-withdrawing groups due to the negative inductive effect ($-I$ effect). Among the given options,$0.1\, M$ difluoroacetic acid contains two fluorine atoms,which exert a strong $-I$ effect,significantly increasing the dissociation of the acid compared to acetic acid,chloroacetic acid,and fluoroacetic acid. Therefore,$0.1\, M$ difluoroacetic acid provides the highest concentration of ions and exhibits the highest electrical conductivity.

The highest electrical conductivity of the following aqueous solutions is of

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