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Question
In which of the following options the order of arrangement does not agree with the variation of the property indicated against it?
Options
I < Br < Cl < F (increasing electron gain enthalpy)
Li < Na < K < Rb (increasing metallic radius)
Al3+ < Mg2+ < Na+ < F− (increasing ionic size)
B < C < O < N (increasing first ionisation enthalpy)
Solution
I < Br < Cl < F (increasing electron gain enthalpy)
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