In which of the following processes energy is absorbed? - Vidyadip

MCQ

In which of the following processes energy is absorbed?

A
$Cl + e^- \to Cl^-$
✓
$O^- + e^- \to O^{2-}$
C
$O^{2-} - e^- \to O^-$
D
$Na^+ + e^- \to Na$

✓

Answer

Correct option: B.

$O^- + e^- \to O^{2-}$

b
$O ^{-}$to $O ^{2-}$ because of interelectronic repulsion, it will require energy to add an electron to its outermost shell.

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