Question: The first ionisation potential of $\mathrm{Na}$ is $5.1 \mathrm{eV}$. The value of electron gain enthalpy of $\mathrm{Na}^{+}$will be?
$-2.55 \mathrm{eV}$
$-5.1 \mathrm{eV}$
$-10.2 \mathrm{eV}$
$+2.55 \mathrm{eV}$
Correct Option: , 4
Solution:
Solution Not Required
