In which of the following arrangements, the order is not according to the property indicated against it?
Li<K<Na<Rb Increasing metallic radius
I<Br<F<Cl Electron gain enthalpy (Without negative sign)
B<Cl<O<N Increasing first Ionisation enthalpy
Increasing ionic size
As we move down the group Zeff increases & the electron gain enthalpy also increases with the negative sign.
With the negative sign, the order should be
Cl<F<Br<I
But without negative sign order will be
I<Br<F<Cl Electron gain enthalpy.