Chemistry - Complete d-block Question with Solution | TestHub

Question Explanation: Verifying statements about permanganate $(\mathrm{X})$ and manganate $(\mathrm{Y})$.

Concept: Properties of Oxoanions.

Solution: X is ${\mathrm{KMnO}}_4$, and Y is ${\mathrm{K}}_2{\mathrm{MnO}}_4$. All the statements are correct: ( X ) is tetrahedral and diamagnetic; (Y) is tetrahedral and paramagnetic; (X) reacts with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ to form oily ${\mathrm{Mn}}_2{\mathrm{O}}_7$.

(A) $\mathrm{X}:{\mathrm{KMn}}^{+7}{\mathrm{O}}_4:{\mathrm{d}}^3\mathrm{s}:$ Tetrahedral and diamagnetic

(B) $\mathrm{Y}:{\mathrm{K}}_2{\stackrel{+6}{\mathrm{MnO}}}_4:{\mathrm{d}}^3\mathrm{s}:$ Tetrahedral and paramagnetic

(C) ${\mathrm{MnO}}_4^{-}+\underset{\left({\mathrm{Conc}}^{\mathrm{n}}.\right)}{{\mathrm{H}}^{+}}\to {\mathrm{HMnO}}_4$ $2{\mathrm{HMnO}}_4+{\mathrm{conc}}^{\mathrm{n}}.{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{Mn}}_2{\mathrm{O}}_7+{\mathrm{H}}_2\mathrm{O}$

strong (oily liquid.)

(dehydrating agent)

Final Answer: All are correct.