Question
Identify the conjugate bases of H _3 PO _3 and H _2 SO _4 respectively from following.
MHT CET
Chemistry
Ionic Equilibrium
2026
MHT CET 2026 (18 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. HPO _3^ 2- and SO _4^ 2-
- B. HPO _3^ 2- and HSO _4^ -
- C. H _2 PO _3^ - and HSO _4^ -
- D. PO _3^ 3- and SO _4^ 2-
Answer
C. H _2 PO _3^ - and HSO _4^ -
Step-by-step solution
The conjugate base of a Bronsted acid is formed by the removal of one proton (H^+) from it. For H_3PO_3, the removal of one H^+ yields its conjugate base: H_3PO_3 H^+ + H_2PO_3^- For H_2SO_4, the removal of one H^+ yields its conjugate base: H_2SO_4 H^+ + HSO_4^- Therefore, the conjugate bases of H_3PO_3 and H_2SO_4 are H_2PO_3^- and HSO_4^- respectively.
Related: Chemistry — Ionic Equilibrium · All PYQ Banks