Chemistry · 2026
JEE Main · 4 April 2026, Shift 2 · Q57
The 1^st ionization enthalpy for Mg is +737 kJ / mol. The most probable estimated value of the 2^nd ionization enthalpy of Mg is ____.
The $\displaystyle 1^{\text {st }}$ ionization enthalpy for Mg is $\displaystyle +737 \mathrm{~kJ} / \mathrm{mol}$. The most probable estimated value of the $\displaystyle 2^{\text {nd }}$ ionization enthalpy of Mg is $\displaystyle \_\_\_\_$.
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle +1450 \mathrm{~kJ} / \mathrm{mol}$
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.