Given below are two statements:
Statement I: In the oxalic acid vs $\mathrm{KMnO}_4$ (in the presence of dil $\mathrm{H}_2 \mathrm{SO}_4$ ) titration the solution needs to be heated initially to $60^{\circ} \mathrm{C}$, but no heating is required in Ferrous ammonium sulphate (FAS) vs $\mathrm{KMnO}_4$ titration (in the presence of dil $\mathrm{H}_2 \mathrm{SO}_4$)
Statement II: In oxalic acid vs $\mathrm{KMnO}_4$ titration, the initial formation of $\mathrm{MnSO}_4$ takes place at high temperature, which then acts as catalyst for further reaction. In the case of FAS vs $\mathrm{KMnO}_4$, heating oxidizes $\mathrm{Fe}^{2+}$ into $\mathrm{Fe}^{3+}$ 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
Match the List - I with List - II
| List - I (Redox Reaction) |
List - II (Type of Redox Reaction) |
||
|---|---|---|---|
| (A) | $\begin{aligned} & \mathrm{CH}_{4(\mathrm{~g})}+2 \mathrm{O}_{2(\mathrm{~g})} \xrightarrow{\Delta} \mathrm{CO}_{2(\mathrm{~g})} \\ & +2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}\end{aligned}$ | (I) | Disproportionation reaction |
| (B) | $2 \mathrm{NaH}_{(\mathrm{s})} \xrightarrow{\Delta} 2 \mathrm{Na}_{(\mathrm{s})}+\mathrm{H}_{2(\mathrm{~g})}$ | (II) | Combination reaction |
| (C) | $\begin{aligned} & \mathrm{V}_2 \mathrm{O}_{5(\mathrm{~s})}+5 \mathrm{Ca}_{(\mathrm{s})} \xrightarrow{\Delta} 2 \mathrm{~V}_{(\mathrm{s})} \\ & +5 \mathrm{CaO}_{(\mathrm{s})}\end{aligned}$ | (III) | Decomposition reaction |
| (D) | $\begin{aligned} & 2 \mathrm{H}_2 \mathrm{O}_{2(\mathrm{aq})} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}+ \\ & \mathrm{O}_{2(\mathrm{~g})}\end{aligned}$ | (IV) | Displacement reaction |
Choose the correct answer from the options given below:
Which of the following oxidation reactions are carried out by both $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ and $\mathrm{KMnO}_4$ in acidic medium?
A. $\Gamma^{-} \rightarrow \mathrm{I}_2$
B. $\mathrm{S}^{2-} \rightarrow \mathrm{S}$
C. $\mathrm{Fe}^{2+} \rightarrow \mathrm{Fe}^{3+}$
D. $\mathrm{I}^{-} \rightarrow \mathrm{IO}_3^{-}$
E. $\mathrm{S}_2 \mathrm{O}_3{ }^{2-} \rightarrow \mathrm{SO}_4^{2-}$
Choose the correct answer from the options given below :
The species which does not undergo disproportionation reaction is :