AP EAMCET · Chemistry · Classification of Elements and Periodicity in Properties
In which of the following sets, elements are not correctly arranged with the property shown in brackets?
- A \(\mathrm{S}\gt\mathrm{Se}\gt\mathrm{O}\) (Electron gain enthalpy)
- B \(\mathrm{F}\gt\mathrm{O}\gt\mathrm{Cl}\) (Electronegativity)
- C \(\mathrm{Na}\gt\mathrm{Li}\gt\mathrm{Al}\) (Metallic radius)
- D \(\mathrm{Na}\gt\mathrm{K}\gt\mathrm{Ba}\) (Metallic nature)
Answer & Solution
Correct Answer
(D) \(\mathrm{Na}\gt\mathrm{K}\gt\mathrm{Ba}\) (Metallic nature)
Step-by-step Solution
Detailed explanation
Electron gain enthalpy:- In a group there is decrease of electron gain enthalpy in general but for p-block elements only the \(\mathrm{EA}_1\) of second period element is less than \(\mathrm{EA}_1\) of third period element. The third period have larger size and vacant 3d…
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