Q9 / 225 · JEE Main 2002 · Chemistry

Species acting as both Bronsted acid and base is

  • Correct answer
    A
    $\left(\mathrm{HSO}_4\right)^{-1}$
  • B
    $\mathrm{Na}_2 \mathrm{CO}_3$
  • C
    $\mathrm{NH}_3$
  • D
    $\mathrm{OH}^{-1}$

Solution

$\left(\mathrm{HSO}_4\right)^{-}$ can accept and donate a proton $\left(\mathrm{HSO}_4\right)^{-}+\mathrm{H}^{+} \rightarrow \mathrm{H}_2 \mathrm{SO}_4$ $\left(\mathrm{HSO}_4\right)^{-}-\mathrm{H}^{+} \rightarrow \mathrm{SO}_4^{2-}$

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

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