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Among acetic acid, chloroacetic acid, dichloroacetic acid, trichloroacetic acid, the strongest acid is:
AAcetic acid, since it is the simplest of the four on the chart
BChloroacetic acid, with one chlorine for moderate pull only
CDichloroacetic acid, with two chlorines for intermediate pull
DTrichloroacetic acid, since three Cl groups withdraw most strongly
Answer & Solution
Correct answer: D. Trichloroacetic acid, since three Cl groups withdraw most strongly
More -Cl groups withdraw more electron density, stabilising the carboxylate anion. Trichloroacetic is the strongest.
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