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

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
The process requiring the absorption of energy is
  • A
    $F \to {F^ - }$
  • B
    $Cl \to C{l^ - }$
  • ✓
    $O \to {O^{2 - }}$
  • D
    $H \to {H^ - }$
✓

Answer

Correct option: C.
$O \to {O^{2 - }}$
c
(c) The second $I.E.$ is greater than first $I.E.$ similarly second $E.A.$ is greater than first $E.A.$ the energy is to be supplied to force the second ${e^ - }$ into the anion.

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