${\rm{I}}{{\rm{P}}_1}{\rm{and I}}{{\rm{P}}_2}$ of ${\rm{Mg}}$ are 178 and 348 kcal ${\rm{mo}}{{\rm{l}}^{ - 1}}$. The energy required for the reaction, ${\rm{Mg}} \to {\rm{M}}{{\rm{g}}^{2 + }} + 2{{\rm{e}}^ - }$ is:

$\begin{array}{*{20}{l}} { + 526{\rm{ }}kcal} \end{array}$

$\begin{array}{*{20}{l}} { + 170{\rm{ }}kcal} \end{array}$

$\begin{array}{*{20}{l}} { - 170{\rm{ }}kcal} \end{array}$

$\begin{array}{*{20}{l}} { - 526{\rm{ }}kcal} \end{array}$

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NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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\mathrm{I}{\mathrm{P}_1}\mathrm{and I}{\mathrm{P}_2}

\mathrm{Mg}

are 178 and 348 kcal

\mathrm{mo}{\mathrm{l}^{ - 1}}

. The energy required for the reaction,

\mathrm{Mg} \to \mathrm{M}{\mathrm{g}^{2 + }} + 2{\mathrm{e}^ - }

is:

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Correct option: B

\begin{array}{llllllllllllllllllll} { + 526\mathrm{ }kcal} \end{array}

Option B (+526 kcal) is correct because it represents the sum of the first and second ionization energies, which is the total energy required to remove two electrons from Mg.

NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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