Which of the following processes involves absorption of energy? (a)...

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Which of the following processes involves absorption of energy?
(a) \( \mathrm{S}(\mathrm{g})+e^{-} \longrightarrow \mathrm{S}^{-}(g) \)
(b) \( \mathrm{S}^{-}+e^{-} \longrightarrow \mathrm{S}^{2-}(g) \)
\( \mathrm{P} \)
(c) \( \mathrm{Cl}(g)+e^{-} \longrightarrow \mathrm{Cl}^{-}(g) \)
(d) None of these
W
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