Q9 / 75 · JEE Main 2025 (4 Apr Shift 2) · Chemistry

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

A
$\mathrm{B} ~\&~ \mathrm{Ga}$
B
B & Tl
C
$\mathrm{Tl} ~\&~ \mathrm{~B}$
Correct answer
D
B & In

Solution

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

Hence, the correct answer is option: 'D'.

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