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

Chemistry · p-Block (I) (Grp. 13, 14)

JEE Main 2025 — 7 April, Morning Shift — Question 9

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 $A^{2+}$ and $\mathrm{B}^{4+}$ respectively is

Option A:
both reducing
Option B:
oxidising and reducing
Option C:
both oxidising
Option D:
reducing and oxidising
Correct

Answer: D

Step-by-step solution

$\Rightarrow \mathrm{A}^{2+}$ has the tendency to lose $\mathrm{e}^{-}-$ so reducing nature

$\Rightarrow \quad \mathrm{B}^{4+}$ has the tendency to gain $\mathrm{e}^{-}$ - so oxidising nature

Answer key and solution verified before publishing.

Practise p-Block (I) (Grp. 13, 14)

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free

Exam: JEE Main 2025
Paper: 7 April, Morning Shift
Subject: Chemistry
Chapter: p-Block (I) (Grp. 13, 14)
Topic: Introduction & Properties of Group 14: Carbon Family