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

1 Hard

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Application +4 | -1

One mole of magnesium in the vapour state absorbed 1200

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

of energy. If the first and second ionisation energies of Mg are 750 and 1450

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

respectively, the final composition of the mixture is

View answer and explanation

Correct option: B

69\mathrm{\% M}{\mathrm{g}^ + } + 31\mathrm{\% M}{\mathrm{g}^{2 + }}

Option B (

69\% \mathrm{Mg}^+ + 31\% \mathrm{Mg}^{2+}

) is correct because it accurately calculates the percentage of Mg+ and Mg2+ ions formed based on the energy absorbed and the ionization energies.

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