Q39 / 120 · VITEEE 2012 · Chemistry

What is the value of electron gain enthalpy of $\mathrm{Na}^{+}$if $\mathrm{IE}_{1}$ of $\mathrm{Na}=5.1 \mathrm{eV}$ ?

Correct answer
A
$-5.1 \mathrm{eV}$
B
$-10.2 \mathrm{eV}$
C
$+2.55 \mathrm{eV}$
D
$+10.2 \mathrm{eV}$

Solution

$\mathrm{IE}_{1}$ of $\mathrm{Na}=-$ Electron gain enthalpy of $\mathrm{Na}^{+}$ion $=-5.1 \mathrm{eV}$

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

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