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STD 11 - 3. Classification of elements and periodicity in properties — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 - 3. Classification of elements and periodicity in properties4 Marks
MCQ
The incorrect statement is
  • A
    The second ionisation energy of $Se$ is greater than that of second ionisation energy of $As$
  • B
    The first ionisation energy of $C^{2+}$ ion is greater than that of first ionisation energy of $N^{2+}$ ion.
  • C
    The third ionisation energy of $F$ is greater than that of third ionisation energy of $O$.
  • ✓
    Halogens have highest $I.E.$ in respective period.
✓

Answer

Correct option: D.
Halogens have highest $I.E.$ in respective period.
d
Nobel gases have highest $IE$ in their respective period

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$13_C$                 $ 1.18$                                 $ 13.1$
$14_C$                 $ 0.02$                                 $ 14.1$

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