Question

Given below are two statements:
Statement I: In the oxalic acid vs KMnO$_4$ (in the presence of dil H$_2$SO$_4$) titration the solution needs to be heated initially to 60°C, but no heating is required in Ferrous ammonium sulphate (FAS) vs KMnO$_4$ titration (in the presence of dil H$_2$SO$_4$).
Statement II: In oxalic acid vs KMnO$_4$ titration, the initial formation of MnSO$_4$ takes place at high temperature, which then acts as catalyst for further reaction. In the case of FAS vs KMnO$_4$, heating oxidizes Fe$^{2+}$ into Fe$^{3+}$ by oxygen of air and error may be introduced in the experiment.
In the light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are false
• B. Both Statement I and Statement II are true
• C. Statement I is false but Statement II is true
• D. Statement I is true but Statement II is false

Hint:

Always verify the role of temperature and catalysts in redox titrations, as they significantly affect reaction rates and mechanisms.

Answer 1

The Correct Option is A

Statement I is false because oxalic acid vs KMnO$_4$ titrations require heating to initiate the reaction. Statement II is also false; MnSO$_4$ does not act as a catalyst in this context, and the oxidation of Fe$^{2+}$ to Fe$^{3+}$ by KMnO$_4$ does not involve atmospheric oxygen.