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JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Analyzing +4 | -1
The value of IE1,IE2,IE3\mathrm{IE}_1, \mathrm{IE}_2, \mathrm{IE}_3 and IE4\mathrm{IE}_4 of an atom are 7.5 eV,25.6 eV,48.6 eV7.5 \mathrm{~eV}, 25.6 \mathrm{~eV}, 48.6 \mathrm{~eV} and 170.6 eV170.6 \mathrm{~eV} respectively.
The electronic configuration of the atom will be:-
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Correct option: B
1 s22 s22p63 s23p11 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^6 3 \mathrm{~s}^2 3 \mathrm{p}^1
Option D (Both (A) and (R) are false) is correct because solid PCl5 exists as an ionic compound, not a molecular solid, and the ions are (PCl4)+ and (PCl6)-.

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