Question

Which of the following transitions involves maximum amount of energy?

• A. $M^{-}(g) \longrightarrow M(g)$
• B. $M^{-}(g) \longrightarrow M^{+}(g)$
• C. $M^{+}(g) \longrightarrow M^{2+}(g)$
• D. $M^{2+}(g) \longrightarrow M^{3+}(g)$

Answer 1

Answer: (D)

$M^{2+} \longrightarrow M^{3+}$, after the removal of $2 e^{-}$, the nuclear charge per electron increases, due to which high energy is required to remove $3 e^{-}$.