The correct option with order of melting points of the pairs ( Mn , Fe ),( Tc , Ru ) and ( Re , Os ) is :

Chemistry · d and f Block Elements

JEE Main 2025 — 29 January, Morning Shift — Question 8

The correct option with order of melting points of the pairs $(\mathrm{Mn}, \mathrm{Fe}),(\mathrm{Tc}, \mathrm{Ru})$ and $(\mathrm{Re}, \mathrm{Os})$ is :

Option A:
$\mathrm{Fe}<\mathrm{Mn}, \mathrm{Ru}<\mathrm{Tc}$ and $\mathrm{Re}<\mathrm{Os}$
Option B:
$\mathrm{Mn}<\mathrm{Fe}, \mathrm{Tc}<\mathrm{Ru}$ and $\mathrm{Re}<\mathrm{Os}$
Option C:
$\mathrm{Mn}<\mathrm{Fe}, \mathrm{Tc}<\mathrm{Ru}$ and $\mathrm{Os}<\mathrm{Re}$
Correct
Option D:
$\mathrm{Fe}<\mathrm{Mn}, \mathrm{Ru}<\mathrm{Tc}$ and $\mathrm{Os}<\mathrm{Re}$

Answer: C

Step-by-step solution

M.P. $\Rightarrow \mathrm{Mn}<\mathrm{Fe}, \mathrm{Tc}<\mathrm{Ru}, \mathrm{Os}<\mathrm{Re}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2025
Paper: 29 January, Morning Shift
Subject: Chemistry
Chapter: d and f Block Elements
Topic: Properties of compounds of 3d Series elements + Comparison between 3d, 4d, 5d