Question:
The correct order of variation of first ionisation enthalpies is:
The correct order of variation of first ionisation enthalpies is:
Updated On: Apr 3, 2025
Ne<Xe>Li>K<Cs
Xe<Li<K<Cs<Ne
Cs>K>Li>Xe>Ne
Li>K>Cs>Ne>Xe
Ne>Xe>Li>K>Cs
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The Correct Option is
Solution and Explanation
Ionization enthalpy trends:
- Neon (Ne): Highest (noble gas configuration)
- Xenon (Xe): Lower than Ne but higher than metals (larger size)
- Alkali metals: Decreases down group (Li > K > Cs)
Correct order: Ne > Xe > Li > K > Cs
Thus, the correct option is (E): \( \text{Ne} > \text{Xe} > \text{Li} > \text{K} > \text{Cs} \).
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