DPP

Consider the following reaction:

${\mathrm{xCr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{yH}}^{+}+{\mathrm{zAsO}}_3^{3-}⟶2{\mathrm{xCr}}^{3+}+{\mathrm{zAsO}}_4^{3-}+\frac{\mathrm{y}}{2}{\mathrm{H}}_2\mathrm{O}$

The values of $\mathrm{x}, \mathrm{y}$ and $\mathrm{z}$ in the reaction, respectively, are:

${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$ ions are in equilibrium with ${\mathrm{CrO}}_4^{2-}$ ions at $\mathrm{pH}=4.$ The yellow chromate solution is obtained when

Which of the following statement(s) is correct about the action of heat on ${\mathrm{KMnO}}_4$?

[Note # Wrong answer option is given in the book]

In chromate ion, $\mathrm{Cr}\left(\mathrm{VI}\right)$ has ${\mathrm{d}}^0$ configuration. Select the incorrect statement(s).

During titration with potassium permanganate, ${\mathrm{H}}_2{\mathrm{SO}}_4$ is preferably used over $\mathrm{HCl}$ and ${\mathrm{HNO}}_3$ to make the solution acidic because

Chromium is extensively used in the electroplating industry. The oxidation of $\mathrm{Cr}$ to ${\mathrm{Cr}}^{2+}$ ion involves the removal of valence electrons from

Select the substance(s) which is/are used to convert ${\mathrm{Mn}}^{2+}$ to ${\mathrm{MnO}}_4^{-}$.

${\mathrm{Na}}_2{\mathrm{CrO}}_4\stackrel{\mathrm{A}}{⟶}{\mathrm{Na}}_2{\mathrm{SO}}_4+\underset{\left(\text{ Orange }\right)}{\mathrm{B}}\stackrel{\mathrm{KCl}}{\to }\underset{\left(\text{ Orange red }\right)}{\mathrm{C}}+\mathrm{NaCl}$

$\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$, respectively, are: