MCQ
Among the following complexes the one which shows Zero crystal field stabilization energy $(CFSE)$ is
- A$[Mn(H_2O)_6]^{3+}$
- ✓$[Fe(H_2O)_6]^{3+}$
- C$[Co(H_2O)_6]^{2+}$
- D$[Co(H_2O)_6]^{3+}$

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$\frac{3}{2} \mathrm{O}_{2(\mathrm{~g})} \rightleftharpoons \mathrm{O}_{3(\mathrm{~g})} \cdot \mathrm{K}_{\mathrm{P}}=2.47 \times 10^{-29} \text {. }$
$\Delta_{\mathrm{r}} \mathrm{G}^{\ominus}$ for the reaction is_______ $kJ$. (Given R $\left.=8.314 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\right)$