Embibe Experts Solutions for Chapter: The d- and f-Block Elements, Exercise 3: Level 3

In the reaction, $2{\mathrm{CuCl}}_2+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{SO}}_2\to \mathrm{A}+{\mathrm{H}}_2{\mathrm{SO}}_4+2\mathrm{HCl}$; $\mathrm{A}$ is

Ferric sulphate on heating gives:

At $300°\mathrm{C},{\mathrm{FeCl}}_3$

Lucas reagent is:

In the dichromate dianion:

Match the compounds of column $\mathrm{X}$ with oxidation state of column $\mathrm{Y}$.

${\mathrm{E}}^{⊝}$ values for couples ${\mathrm{Cr}}^{3+}/{\mathrm{Cr}}^{2+}$ and ${\mathrm{Mn}}^{3+}/{\mathrm{Mn}}^{2+}$ are $-0.41$ and $+1.51$ volts, respectively. Considering these values, select the correct option from the following statements.

Amongst the following the lowest degree of paramagnetism per mole of the compound at $298 \mathrm{K}$ will be shown by: