p-Block Elements: Part I (Group 13 & 14) JEE Main PYQs, 2020 to 2025

The correct statements from the following are :

(A) Tl³⁺ is a powerful oxidising agent

(B) Al³⁺ does not get reduced easily

(C) Both Al³⁺ and Tl³⁺ are very stable in solution

(D) Tl¹⁺ is more stable than Tl³⁺

(E) Al³⁺ and Tl¹⁺ are highly stable

Choose the correct answer from the options given below :

The group 14 elements $A$ and $B$ have the first ionisation enthalpy values of 708 and $715 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively. The above values are lowest among their group members. The nature of their ions $\mathrm{A}^{2+}$ and $\mathrm{B}^{4+}$ respectively is