Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Compounds – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard
Hydration of metal ions $\left(\mathrm{M}^{2+}\right)$ produces an enthalpy change that is commensurate with the size, charge of the ion and crystal field stabilisation energy (CFSE). So, $\Delta \mathrm{H}_{\text {hydration }}$ shows non-linear variation if C.F.S.E. $\neq 0$. If $\mathrm{CFSE}=0$ (i.e. for $\mathrm{Ca}, \mathrm{Mn}$ and Zn which has $\mathrm{d}^{0}$,
(d)$^{5}$ and $\mathrm{d}^{10}$ configuration respectively), then it lies on the straight line.
Answer
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