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The s-block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe s-block Elements2 Marks
Question
Name an element from Group 2 which forms an amphoteric oxide and awater soluble sulphate.
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Answer

Due to small size and somewhat high ionization enthalpy of $\mathrm{Be}, \mathrm{Be}(\mathrm{OH})_2$ is amphoteric in nature, i.e., it reacts with both acids and bases. Further, due to small size, the hydration enthalpy of $\mathrm{Be}^{2+}$ ions is much higher than the lattice enthalpy of $\mathrm{BeSO}_4$. As a result, $\mathrm{BeSO}_4$ is highly soluble in water.

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