Q4 / 120 · VITEEE 2007 · Chemistry

The weakest acid amongst the following is

  • A
    $\mathrm{ClCH}_{2} \mathrm{COOH}$
  • Correct answer
    B
    $\mathrm{HCOOH}$
  • C
    $\mathrm{FCH}_{2} \mathrm{CH}_{2} \mathrm{COOH}$
  • D
    $\mathrm{CH}_{2}(\mathrm{I}) \mathrm{COOH}$

Solution

Proton doners are acids. Electron withdrawing groups (like halogens) increase the acidity of carboxylic acids. Therefore, $\mathrm{HCOOH}$ is weakest acid among the given choices.

Hence, the correct answer is option: 'B'.

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