Match List - I with List - II. List - I List - II (A) Bronze (I) (B) Brass (II) (C) UK silver coin (III)...

Consider the following reactions $$ \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \xrightarrow[-\mathrm{H}_{2} \mathrm{O}]{\mathrm{KOH}}[\mathrm{~A}] \xrightarrow[-\mathrm{H}_{2} \mathrm{O}]{\mathrm{H}_{2} \mathrm{O}_{4}}[\mathrm{~B}]+\mathrm{K}_{2} \mathrm{SO}_{4} $$ The products $[\mathrm{A}]$ and $[\mathrm{B}]$, respectively are :

The molar mass of the water insoluble product formed from the fusion of chromite ore (${\rm{FeC}}{{\rm{r}}_2}{{\rm{O}}_4}$) with ${\rm{N}}{{\rm{a}}_2}{\rm{C}}{{\rm{O}}_3}$ in presence of ${{\rm{O}}_2}$ is _______ $...

The correct option with order of melting points of the pairs $({\rm{Mn}},{\rm{Fe}}),({\rm{Tc}},{\rm{Ru}})$ and $({\rm{Re}},{\rm{Os}})$ is :

Preparation of potassium permanganate from ${\rm{Mn}}{{\rm{O}}_2}$ involves two step process in which the 1st step is a reaction with KOH and ${\rm{KN}}{{\rm{O}}_3}$ to produce

Niobium (Nb) and ruthenium (Ru) have "x" and "y" number of electrons in their respective 4 d orbitals. The value of x + y is...