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Periodic Table and Periodicity question

2011 · Q79
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Periodic Table and Periodicity question

2011 · Q79

NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1
What is the value of electron gain enthalpy of Na+ if IE1 of Na = 5.1 eV?
  1. A
    −-− 5.1 eV
  2. B
    −-− 10.2 eV
  3. C
    +2.55 eV
  4. D
    +10.2 eV
View written solutionFree

Correct answer: A

Na →\to→ Na+ + e-; Δ\Delta ΔH = 5.1 eV

Na+ + e- →\to→ Na; Δ\Delta ΔH = -5.1 eV

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