Given below are two statements :
Statement I: 
is the correct order in terms of first ionization enthalpy values.
Statement II: 
is the correct order in terms of the magnitude of electron gain enthalpy values.
In the light of the above statements, choose the correct answer from the options given below:
Text Solution
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Statement I:
Ionization enthalpy generally increases across a period from left to right.
However, Nitrogen 
has a stable half-filled electronic configuration, making it harder to remove an electron compared to Oxygen 
.
Thus, the order is 
.
Statement I is true.
Statement II:
For Group 16 elements, Oxygen has an exceptionally low magnitude of electron gain enthalpy due to its small size and high inter-electronic repulsions in the 
subshell.
The magnitude of electron gain enthalpy decreases down the group from Sulphur onwards.
The correct order of magnitude is 
.
Statement II is true.
Both statements are correct.
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