Embibe Experts Solutions for Chapter: Redox Reactions, Exercise 2: EXERCISE-2

During the disproportionation of lodine to iodide and iodate ions, the ratio of iodate and iodide ions formed in alkaline medium is :

When $\mathrm{ZnS}$ is boiled with strong nitric acid, the products are zinc nitrate, sulphuric acid and nitrogen dioxide. What are the changes in the oxidation numbers of $\mathrm{Zn},\mathrm{S}$ and $\mathrm{N}$:

${\mathrm{CN}}^{-}$ is oxidised by ${\mathrm{NO}}_3^{-}$ in the presence of an acid : ${\mathrm{aCN}}^{-}+{\mathrm{bNO}}_3^{-}+{\mathrm{cH}}^{+}⟶\left(\mathrm{a}+\mathrm{b}\right)\mathrm{NO}+{\mathrm{aCO}}_2+\frac{\mathrm{c}}{2}{\mathrm{H}}_2\mathrm{O}$. What are the whole number values of $\mathrm{a}, \mathrm{b}, \mathrm{c}$ in that order?

Which of the following solutions will exactly oxidize $25 \mathrm{mL}$ of an acid solution of $0.1 \mathrm{M}$ iron$\left(\mathrm{II}\right)$ oxalate?

$35 \mathrm{mL}$ sample of hydrogen peroxide gives off $500 \mathrm{mL}$ of ${\mathrm{O}}_2$ at ${27}^{\circ }\mathrm{C}$ and $1$ $\mathrm{atm}$ pressure. Determine volume strength of ${\mathrm{H}}_2{\mathrm{O}}_2$ sample.

$0.80 \mathrm{g}$ of sample of impure potassium dichromate was dissolved in water and made upto $500 \mathrm{mL}$ solution. $25 \mathrm{mL}$ of this solution treated with excess of $\mathrm{KI}$ in acidic medium and ${\mathrm{I}}_2$ liberated required $24 \mathrm{mL}$ of a sodium thiosulphate solution. $30 \mathrm{mL}$ of this sodium thiosulphate solution required $15 \mathrm{mL}$ of $\frac{\mathrm{N}}{20}$ solution of pure potassium dichromate. What was the percentage of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$ in given sample?

The following reaction describes the rusting of iron, $4\mathrm{Fe}+3{\mathrm{O}}_2⟶4{\mathrm{Fe}}^{3+}+6{\mathrm{O}}^{2-}.$ Which one of the following statements are correct:

How many litres of ${\mathrm{Cl}}_2$ at $\mathrm{S}.\mathrm{T}.\mathrm{P}.$ will be liberated by oxidation of $\mathrm{NaCl}$ with $10 \mathrm{g} {\mathrm{KMnO}}_4:-$