Q39 / 160 · TS EAMCET 2018 (07 May Shift 1) · Chemistry

The strongest acid among the following is

  • A
    acetic acid
  • B
    acrylic acid
  • Correct answer
    C
    benzoic acid
  • D
    propionic acid

Solution

Acidity depends on stability of the conjugate base, and also due to inductive effect. Longer hydrocarbon chain would push more electrons towards the carboxylic group and release of proton $\left(\mathrm{H}^{+}\right)$would be difficult and thus, benzoic acid is most strong.

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

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