GATE CY 2025 Question Paper (15-Feb-2025) (Shift-1)

The reaction that proceeds through an oxidative addition followed by a reductive elimination is
[Given: Atomic numbers Ni = 28, Ta = 73, Zr = 40, Pt = 78]

The homogeneous catalyst whose metal ion does NOT undergo either oxidation or reduction in any of the steps during the hydrogenation of terminal olefins is

The given zirconocene compound, $({\eta }^5-\text{Cp}{)}_2{\text{ZrEt}}_2$, when heated in the presence of an equimolar amount of ${\text{PMe}}_3$ results in the formation of a compound $X$ which obeys the 18 electron rule. The reaction also resulted in the release of a saturated hydrocarbon.

[Given: Atomic number of $\text{Zr}=40$ ]


The structure of compound $X$ is ________

The ${}^{1}H$ NMR spectrum of the given iridium complex at room temperature gave a single signal at 2.6 ppm, and its ${}^{31}P$ NMR spectrum gave a single signal at 23.0 ppm. When the spectra were recorded at lower temperatures, both these signals split into a complex pattern. The intra-molecular dynamic processes shown by this molecule are

The effective magnetic moment, ${\mu }_{eff}$ value for $[Cr(H_{2}O{)}_6{]}^{3+}$ taking into account for spin-orbit coupling is closest to
[Given: Atomic number of Cr = 24, spin-orbit coupling constant $\lambda =92{\text{ cm}}^{-1}$, and ${\Delta }_o=17400{\text{ cm}}^{-1}$ ]