JEE MAIN - Chemistry (2020 - 2nd September Morning Slot - No. 7)
In general the property (magnitudes only) that
show an opposite trend in comparison to other
properties across a period is
Electron gain enthalpy
Electronegativity
Ionization enthalpy
Atomic radius
Explanation
Across a period (left to right) in the periodic table :
Ionization enthalpy tends to increase
Electron gain enthalpy (in magnitude) tends to increase (more negative values)
Electronegativity tends to increase
Atomic radius tends to decrease
Hence, atomic radius shows the opposite trend compared to the other three properties. Therefore, the correct answer is
(D) Atomic radius.
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