Embibe Experts Solutions for Chapter: Redox Reactions, Exercise 4: Exercise 4

In the balanced chemical reaction, ${\mathrm{IO}}_3^{-}+{\mathrm{aI}}^{-}+{\mathrm{bH}}^{+}\to {\mathrm{cH}}_2\mathrm{O}+{\mathrm{dI}}_2$ a, b, c and d respectively correspond to :

In the following redox equation,
${\mathrm{xUO}}^{2+}+{\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{yH}}^{+}\to {\mathrm{aUO}}_2^{2+}+{\mathrm{zCr}}^{3+}+{\mathrm{bH}}_2\mathrm{O}$
The values of coefficients $\mathrm{x}, \mathrm{y}$ and $\mathrm{z}$ respectively are:

${\mathrm{MnO}}_2+\mathrm{NaCl}\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{H}}^{+}}{\to }}$

Choose incorrect statement for above reaction.

For decolorization of 1 mole of KMnO4, the  moles of H2O2 required is:

Number of electrons transferred in each case when ${\mathrm{KMnO}}_4$ acts as an oxidising agent to give ${\mathrm{MnO}}_2$, ${\mathrm{Mn}}^{2+},\mathrm{Mn}(\mathrm{OH}{)}_3$ and ${\mathrm{MnO}}_4^{2-}$ are, respectively:

In view of the signs of ${\mathrm{\Delta }}_{\mathrm{r}}\mathrm{G}°$ for the following reactions: 

${\mathrm{PbO}}_2+\mathrm{Pb}\to 2\mathrm{PbO}$, ${\mathrm{\Delta }}_{\mathrm{r}}\mathrm{G}°<0$

${\mathrm{SnO}}_2+\mathrm{Sn}\to 2\mathrm{SnO}$, ${\mathrm{\Delta }}_{\mathrm{r}}\mathrm{G}°>0$

which oxidation states are more characteristics for lead and tin?

When ${\mathrm{KMnO}}_4$ acts as an oxidising agent and ultimately forms ${\mathrm{MnO}}_4^{2-}, {\mathrm{MnO}}_2, {\mathrm{Mn}}_2{\mathrm{O}}_3$ and ${\mathrm{Mn}}^{2+}$. The number of electrons transferred in each case is:

Consider the following reaction:
${\mathrm{xMnO}}_4^{-}+{\mathrm{yC}}_2{\mathrm{O}}_4^{2-}+{\mathrm{zH}}^{+}\to {\mathrm{xMn}}^{2*}+2{\mathrm{yCO}}_2+\frac{\mathrm{z}}{2}{\mathrm{H}}_2\mathrm{O}$
The values of $\mathrm{x}, \mathrm{y}$ and $\mathrm{z}$ in the reaction are, respectively: