Question:
The CORRECT order of first ionisation enthalpy is:
Correct Option: 3,
Solution:
$\mathrm{Mg} \mathrm{Al} \quad \mathrm{P} \quad \mathrm{S} \rightarrow \mathrm{IE}$. order $\Rightarrow \mathrm{Al}<\mathrm{Mg}<\mathrm{S}<\mathrm{P}$
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