StreakPeaked· Practice

ExamsNEETChemistry

KMnO4 can be prepared from K2MnO4 as per the reaction: 3MnO4^2− + 2H2O → 2MnO4^− + MnO2 + 4OH^−. The reaction can go to completion by removing OH^− ions by adding:

  1. KOH
  2. CO2
  3. SO2
  4. HCl

Correct answer: CO2

Solution

The reaction can be driven to completion by removing OH⁻ ions. CO₂ reacts with OH⁻ to form HCO₃⁻ or CO₃²⁻, thus reducing the concentration of OH⁻ and shifting the equilibrium forward.

Related NEET Chemistry questions

⚔️ Practice NEET Chemistry free + battle 1v1 →