Q34 / 180 · AIIMS 2016 · Chemistry

The reaction, $\mathrm{C}_6 \mathrm{H}_5 \mathrm{ONa}+\mathrm{CO}_2+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{C}_6 \mathrm{H}_5 \mathrm{OH}+\mathrm{NaHCO}_3$ suggests that

  • A
    phenol is a stronger acid than carbonic acid
  • Correct answer
    B
    carbonic acid is a stronger acid than phenol
  • C
    water is a stronger acid than phenol
  • D
    None of these.

Solution

Since a stronger acid displaces a weaker acid from its salts, therefore, carbonic acid $\left(\mathrm{CO}_2+\mathrm{H}_2 \mathrm{O} \equiv \mathrm{H}_2 \mathrm{CO}_3\right)$ is a stronger acid than phenol.

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

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