The elements of Group 13 with highest and lowest first ionisation enthalpies are respectively:

The elements of Group 13 with highest and lowest first ionisation enthalpies are respectively:
  1. $\mathrm{B} ~\&~ \mathrm{Ga}$
  2. B & Tl
  3. $\mathrm{Tl} ~\&~ \mathrm{~B}$
  4. B & In

Solution

IE order
$\mathrm{B} \gt \mathrm{T} \ell \gt \mathrm{Ga} \gt \mathrm{Al} \gt \mathrm{In}$

Asked in: JEE Main 2025 (04 Apr Shift 2)

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