Redox Reactions and 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

Describe the experiment to determine the effect of temperature on the rate of reaction between potassium persulphate and potassium iodide. What is the conclusion drawn from the experiment?

How many $\mathrm{ml}$ of $0.125$ $\mathrm{M}$ ${\mathrm{Cr}}^{3+}$ must be reacted with $12.00 \mathrm{ml}$ of $0.200 \mathrm{M}$ ${{\mathrm{MnO}}_4}^{-}$ if the redox products are ${\mathrm{Cr}}_2{{\mathrm{O}}_7}^{2-}$and ${\mathrm{Mn}}^{2+}$$?$

$3.5 \mathrm{g}$ of a mixture of $\mathrm{NaOH}$ and $\mathrm{KOH}$ were dissolved and made up to $250 \mathrm{ml}. 25 \mathrm{mL}$ of this solution were completely neutralized by $17 \mathrm{mL}$ of $(\mathrm{N}/2) \mathrm{HCl}$solution. The percentage of $\mathrm{KOH}$ in mixture is:

Which compound decolourises iodine solution?

Consider the redox reaction $2{\mathrm{S}}_2{\mathrm{O}}_3^{2-}+{\mathrm{I}}_2⟶{\mathrm{S}}_4{\mathrm{O}}_6^{2-}+2{\mathrm{I}}^{-}:$

$5 \mathrm{mL}$of $8 \mathrm{N}$ nitric acid, $4.8 \mathrm{mL}$ of $5 \mathrm{N}$ hydrochloric acid and a certain volume of $17 \mathrm{M}$ sulphuric acid are mixed together and made up to $2 \mathrm{L}$. $30 \mathrm{mL}$ of this acid mixture exactly neutralise $42.9 \mathrm{mL}$ of sodium carbonate solution containing one gram of ${\mathrm{Na}}_2{\mathrm{CO}}_3.10{\mathrm{H}}_2\mathrm{O}$ in $100 \mathrm{mL}$ of water. Calculate the amount in grams of the sulphate ions in solution. Report the answer after multiplying with 10 and round off to the nearest integer._​

Phenolphthalein does not act as an indicator for the titration between:

$10 \mathrm{mL} \mathrm{of} {\mathrm{H}}_2{\mathrm{O}}_2$solution on treatment with KI and titration of liberated I₂, required $10 \mathrm{mL} \mathrm{of} 1\mathrm{N}$ hypo. Thus H₂O₂ is -

Acidified ${\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4$ oxidises oxalic acid to ${\mathrm{C}\mathrm{O}}_2.$ What is the volume (in litres) of ${10}^{-4}\mathrm{M}\mathrm{ }{\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4$ required to completely oxidise $0.5 \mathrm{L}$ of ${10}^{-2}$ $\mathrm{M}$ oxalic acid in acid medium?

Amount of oxalic acid present in a solution can be determined by its titration with ${\mathrm{K}\mathrm{M}\mathrm{n}\mathrm{O}}_4$ solution in the presence of ${\mathrm{H}}_2{\mathrm{S}\mathrm{O}}_4.$ The titration given unsatisfactory result when carried out in the presence of HCl because HCl

The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is

A mixture of $\mathrm{FeO}$ and ${\mathrm{Fe}}_2{\mathrm{O}}_3$ is completely reacted with $100 \mathrm{mL}$ of $0.25 \mathrm{M}$ acidified ${\mathrm{KMnO}}_4$ solution. The resultant solution was then titrated with zinc dust which converted ${\mathrm{Fe}}^{3+}$ of the solution to ${\mathrm{Fe}}^{2+}$. The ${\mathrm{Fe}}^{2+}$ required $1000 \mathrm{mL}$ of $0.1 \mathrm{M} {\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ solution. Find out the percentage weight of ${\mathrm{Fe}}_2{\mathrm{O}}_3$ in the mixture.

Iodine oxidises ${\mathrm{S}}_2{\mathrm{O}}_3^{2-}$ ion to

1.2 g of a salt with its empirical formula K_xH_y(C₂O₄)_z was dissolved in 50 mL of water and its 10 mL portion required 11 mL of a 0.1 M HCl solution to reach the equivalence point. In a separate titration, 15 mL of the stock solution required 20 mL 0.2475 M KOH to reach the equivalence point. Determine the empirical formula of salt.