In which of the following options, the order of arrangement does not agree with the variation of property indicated against it?
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a
Li < Na < K < Rb (increasing metallic radius)
b
Al3+
c
B < C < N < O (increasing first ionization enthalpy)
d
I < Br < Cl < F (increasing electron gain enthalpy)
answer is C.
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Detailed Solution
Incorrect option are (3) & (4)Correct order of increasing 1st I.E. → B < C < O < Ncorrect order of increasing electron gainEnthalpy → I < Br < F < Cl (in magnitude)Values (in kJ/mol) → 296,325,333,249