Given below are two statements: Statement 1: The number of pairs, from the following, in which both the ions are coloured in aqueous solution is...

"X" is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6 oxidation state in " X...

Consider the following statements about manganate and permanganate ions. Identify the correct statements. A. The geometry of both manganate and permanganate ions is tetrahedral. B....

The oxidation state of chromium in the final product formed in the reaction between KI and acidified $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ solution is:

Identify the metal ions among $\mathrm{Co}^{2+}, \mathrm{Ni}^{2+}, \mathrm{Fe}^{2+}, \mathrm{V}^{3+}$ and $\mathrm{Ti}^{2+}$ having a spin-only magnetic moment value more than 3.0 BM . The sum of...

Given below are some of the statements about Mn and $\mathrm{Mn}_2 \mathrm{O}_7$. Identify the correct statements.
A. Mn forms the oxide $\mathrm{Mn}_2 \mathrm{O}_7$, in which...

Among the following oxides of 3 d elements, the number of mixed oxides are $\_\_\_\_$ $...

Given below are two statements :
Statement I: The first ionization enthalpy of Cr is lower than that of Mn .
Statement II: The second...

Consider the following reactions : $$ \begin{aligned} & \mathrm{NaCl}+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{~A}+\mathrm{KHSO}_4+\mathrm{NaHSO}_4+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{~A}+\mathrm{NaOH} \rightarrow \mathrm{~B}+\mathrm{NaCl}+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{~B}+\mathrm{H}_2 \mathrm{SO}_4+\mathrm{H}_2...

$\mathrm{MnO}_4{ }^{2-}$, in acidic medium, disproportionates to :