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Emission and Absorption Spectra

Which of the ...

Question

Which of the following transitions will involve maximum amount of energy?

M \to M^{+} + e^{-}

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M^{-} \to M^{+} + 2 e^{-}

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M^{2 +} \to M^{3 +} + e^{-}

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M^{+} \to M^{2 +} + e^{-}

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Solution

The correct option is B $M^{2 +} \to M^{3 +} + e^{-}$
The ionization energy of a multivalent atom increases with the consecutive removal of the electron. This is due to an increase in effective nuclear charge on the valence electron that makes it difficult to ionize a cation.
Therefore $I E_{1} < I E_{2} < I E_{3}$ and so on
thus maximum amount of energy is required for $M^{2 +} \to M^{3 +} + e^{-}$
option C

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Similar questions

M (s) \to M (g) M (s) \to M^{2 +} (g) + 2 e^{-}

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M

M (s) ⟶ M (g)

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M (s) \to M (g) . . . . . (a)

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M (g) \to M^{2 +} (g) + 2 e^{-} . . . . . (e)

M (s)

M^{+} (g)

M (s) \to M (g) . . . . . (a)

M (s) \to M^{2 +} (g) + 2 e^{-} . . . . . (b)

M (g) \to M^{+} (g) + e^{-} . . . . . (c)

M^{+} (g) \to M^{2 +} (g) + e^{-} . . . . . (d)

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M (s)

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