How many litres of ${\mathrm{SO}}_2$ taken at NTP have to be passed through a solution of ${\mathrm{HClO}}_3$ to reduce $16.9 \mathrm{g}$ of it to $\mathrm{HCl}$?

(Atomic mass of $\mathrm{S}=32, \mathrm{O}=16, \mathrm{H}=1, \mathrm{Cl}=35.5$)

How many gram of ${\mathrm{H}}_2\mathrm{S}$ will react with $6.32 \mathrm{g}$ of ${\mathrm{KMnO}}_4$ to produce ${\mathrm{K}}_2{\mathrm{SO}}_4$ and ${\mathrm{MnO}}_2?$

What is the weight of $1 \mathrm{gram}$ equivalent of the oxidising and the reducing agent in the following reaction?

$5\mathrm{Zn}+{\mathrm{V}}_2{\mathrm{O}}_5\to 5\mathrm{ZnO}+2\mathrm{V} \left(\mathrm{V}=50·94, \mathrm{Zn}=65.38\text{ and }\mathrm{O}=16\right)$

Write the following oxidising agents in the increasing order of equivalent weight:

$\begin{array}{l}{\mathrm{KMnO}}_4\to {\mathrm{Mn}}^{2+}\\ {\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7\to {\mathrm{Cr}}^{3+}\\ {\mathrm{KMnO}}_4\to {\mathrm{MnO}}_2\end{array}$

${\mathrm{KIO}}_3\to {\mathrm{I}}^{-}$

${\mathrm{KClO}}_3\to {\mathrm{Cl}}^{-}$

Find the equivalent weight of ${\mathrm{H}}_3{\mathrm{PO}}_4$, in each of the following reactions:

${\mathrm{H}}_3{\mathrm{PO}}_4+{\mathrm{OH}}^{-}\to {\mathrm{H}}_2{\mathrm{PO}}_4^{-}+{\mathrm{H}}_2\mathrm{O}$

${\mathrm{H}}_3{\mathrm{PO}}_4+2{\mathrm{OH}}^{-}\to {\mathrm{HPO}}_4^{2-}+2{\mathrm{H}}_2\mathrm{O}$

Calculate the equivalent weight of ${\mathrm{SO}}_2$ in the following reactions:

$\left(\mathrm{a}\right) {\mathrm{SO}}_2+2{\mathrm{H}}_2\mathrm{S}=3\mathrm{S}+2{\mathrm{H}}_2\mathrm{O}$

$\left(\mathrm{b}\right) 5{\mathrm{SO}}_2+2{\mathrm{KMnO}}_4+2{\mathrm{H}}_2\mathrm{O}={\mathrm{K}}_2{\mathrm{SO}}_4+2{\mathrm{MnSO}}_4+2{\mathrm{H}}_2{\mathrm{SO}}_4$