JEE Advanced · 2025 · 18 May 2025 · Paper 1 · d and f Block Elements

The pair(s) of diamagnetic ions is(are)

In the scheme given below, $\mathbf{X}$ and $\mathbf{Y}$, respectively, are

Metal halide $\stackrel{\text{ aq. }\mathrm{NaOH}}{\to }$ White precipitate (P) + Filtrate (Q) …

LIST-I contains metal species and LIST-II contains their properties.
| (II) ${\left[{\mathrm{RuCl}}_6\right]}^{2-}$ | (Q) …

The calculated spin only magnetic moments of ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ and ${\left[{\mathrm{CuF}}_6\right]}^{3-}$ in BM, respectively, are (Atomic numbers of Cr and Cu are 24 and 29, respectively)

An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL of $3\%{\mathrm{H}}_2{\mathrm{O}}_2$, a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) comp …

Fusion of ${\mathrm{MnO}}_2$ with KOH in presence of ${\mathrm{O}}_2$ produces a salt $\mathbf{W}$. Alkaline solution of $\mathbf{W}$ upon eletrolytic oxidation yields another salt $\mathbf{X}$. The manganese containing ions present in $\mathbf{W}$ and $\mathbf{X}$, …