Chemistry - Complete s-block Question with Solution | TestHub

Lithium's high hydration energy makes its $E_{L{i}^{+}/Li}$ value most negative. However, its small size and strong metallic bonding result in a higher activation energy for reaction with water compared to sodium, making its reaction less vigorous.

Let's analyze why other options are incorrect:

A. White metal is typically an alloy of tin, lead, or antimony, not Li and Pd. It's used for bearings.

B. Magnesium nitrate crystallizes as $Mg(N{O}_3{)}_2\cdot 6H_{2}O$, but barium nitrate crystallizes as anhydrous $Ba(N{O}_3{)}_2$.

D. Beryllium chloride ($BeC{l}_2$) has a chain polymeric structure in the solid phase. In the vapor phase, it exists as a dimer ($B{e}_{2}C{l}_4$) at lower temperatures and a monomer ($BeC{l}_2$) at higher temperatures.