Q40 / 180 · AIIMS 2009 · Chemistry

Which of the following has the highest tendency to give the reaction, $M_{(g)}^{+} \underset{\text { medium }}{\stackrel{\text { aqueous }}{\longrightarrow}} M_{(a q)}^{+} ?$

  • A
    $\mathrm{Na}$
  • Correct answer
    B
    $\mathrm{Li}$
  • C
    $\mathrm{K}$
  • D
    $\mathrm{Rb}$

Solution

Because of its smallest size, $\mathrm{Li}^{+}$has highest hydration energy and hence the highest stability of hydrated $\mathrm{Li}^{+}$ion.

Hence, the correct answer is option: 'B'.

Relevant Questions