What is the purpose of adding sulfuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ to the reaction mixture during the titration?

Given below are two statements:
Statement I: In redox titration, the indicators used are sensitive to change in $\mathrm{pH}$ of the solution.
Statement II: In acid-base titration, the indicators used are sensitive to change in oxidation potential.

In the light of the above statements, choose the most appropriate answer from the options given below

Which apparatus is essential for titrating ${\mathrm{KMnO}}_4$ with Mohr's salt?

What should you do before starting a titration of ${\mathrm{KMnO}}_4$ solution with Mohr's Salt solution to ensure accurate results?

Which of the following is NOT a required chemical for the titration of ${\mathrm{KMnO}}_4$ with Mohr's salt?

What is the primary role of Mohr's salt in the titration of ${\mathrm{KMnO}}_4$ solution?

What is the primary purpose of titrating ${\mathrm{KMnO}}_4$ against Mohr's salt solution?

Which indicator is commonly used in the titration of ${\mathrm{KMnO}}_4$ vs. Mohr's salt solution?

During the titration, if the potassium permanganate $\left({\mathrm{KMnO}}_4\right)$ solution is exposed to light, what error might occur?

Why is it essential to use freshly prepared Mohr's salt solution in the titration of ${\mathrm{KMnO}}_{4 }$with Mohr's salt?

Which of the following statement is incorrect?