The reaction, $\mathrm{C}_6 \mathrm{H}_5 \mathrm{ONa}+\mathrm{CO}_2+\mathrm{H}_2 \mathrm{O} \rightarrow…
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
phenol is a stronger acid than carbonic acid
carbonic acid is a stronger acid than phenol
water is a stronger acid than phenol
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.