Ionic species are stabilised by the dispersal of charge, which of the following carboxylate ions is the most positive charge?

C H_{3} - O | | C - - O

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C l - C H_{2} - O | | C - - O

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F - C H_{2} - O | | C - - O

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F - C | F H_{2} - O | | C - - O

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Solution

The correct option is D $F - C | F H_{2} - O | | C - - O$
As $F$ is the most electronegative and in (D) structure, there are two $F$ atoms, therefore, dispersal of negative charge is maximum, hence it is the most stable.

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