The correct decreasing order for acid strength is:

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Chemistry

Inductive Effect

Basic Concepts of GOC

Acidic and Basic Oxides

Question

The correct decreasing order for acid strength is:

NO₂CH₂COOH > NCCH₂COOH > FCH₂COOH > ClCH₂COOH

NO₂CH₂COOH > FCH₂COOH > CNCH₂COOH > ClCH₂COOH

FCH₂COOH > NCCH₂COOH > NO₂CH₂COOH > ClCH₂COOH

CNCH₂COOH > O₂NCH₂COOH > FCH₂COOH > ClCH₂COOH

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Acid strength in this case varies directly with the electron withdrawing power of the groups attached to the a-carbon of CH3COOH. The order of electron withdrawing tendency is

NO₂ > CN > F > Cl