Question

Sulfuric acid, $H_{2}S{O}_4$ is a diprotic acid. which hydrogen ion is most difficult to remove ?

• A. The first
• B. The second
• C. They are both equally difficult to remove
• D. None of the above

Answer 1

The correct option is B The second

It is more difficult to remove a positively charged proton$\left(H^{+}\right)$ from a negatively charged anion due to electrostatic force. Thus second hydrgen from $H_{2}S{O}_4$ is dificult to remove as compared to first hydrogen. Hence option B is correct.